I wonder how decentralized Grin will be once ASICs hit this network. I feel that Innosilicon's ASICs are strategically priced to insure that 'ROI = never' and fear that Innsolicon will be mostly solo mining Grin, as planned (Innosilicon to be their own best customer in employing their ASICs, see Bitmain). Lets glimpse how distributed Grin will be in a post-ASIC era.
http://www.strawpoll.me/18860003

If ASICs really are a must, perhaps a better solution of distribution would be a fixed and locked split of:
C31/C32+ for ASICs = 50% block reward
C29 for GPUs with biannual forks (tweak algo to brick ASICs/FPGAs) = 50% block reward

The entire point of listing here is so that we can avoid eBay fees, which is why I've priced everything lower here than on eBay (as in lower than any other eBay listing, regardless of the source/seller), so no, you don't have to purchase on eBay. You don't need my permission to purchase from my eBay listings, you'd just do it, but I'd rather you didn't.  I can't be for certain that shipping to Serbia is $55 or not, that depends on what items and what quantity, along with your full address.

Just now saw your post, best to send me a DM. Didn't have notifications turned on for this thread, but I do now.
If you want to use an escrow service, that's fine, as long as you cover those fees, if there are any. I haven't used an escrow service for an internet deal since the 1990s, back in the pre-eBay days. I'm established as it gets for internet deals, so no need, but whatever makes you feel safe.

Do NOT upgrade to NBMiner v25.1, it does not function at all for c29 or c31 of Grin. All GPU rigs functioned under v25.0, now miner won't start with same configuration under v25.1.

Updated with current stock for sale, prices lowered.

Not all cards are created equally, even of the same make and model, hashrates will vary. I've seen as much as 100% hash discrepancies among one EVGA FTW3 1080 Ti Hybrid to another. What you can do is update your drivers, all OS updates, latest mining program, optimize power, core, and memory settings in MSI Afterburner, and be sure they have sufficient power too, say 50% load on PSU is optimal for power efficiency.

Current CB limits as of today: https://i.postimg.cc/597qNvPf/cb-limits.jpg

I've never purchased or traded any crypto on CB, but my limits keep changing. I just take the quizzes for free crypto and use the referral link for people I bring to crypto.

Bump, added Baikal Giant B ASICs for sale, total of 5 on hand as of this update.

I've been using Bitmesh to buy Grin for my friends and family that want to get in. Its been smooth, no issues. Largest limit buy order I placed was 3000+ grin and liquidity was sufficient, never needed to revise bid. None of these orders were for myself, but I did everything from my end. Withdrawals to wallets were also problem free. Have used GrinPurse, DiagonAlley, and now Grin++ all with Bitmesh successfully.
https://bitmesh.com/

Was looking forward to Binance listing Grin, but now that they are to block USA users, I'm not as optimistic about the Binance effect.

You can also try Gen 1. I've done a dozen or so builds with the H370 Mining Master, most of which are exclusively 20 series and either gen1 or gen2 PCI-E speed solves.

Updated, all is current, ships within 1 day of payment.

Ya'll still waiting on your R7s or are the results not worth reporting?

Would like to know current results on:
x16r (RVN)
Equihash 150.5 (Beam)
cuckaroo29, cuckaroo31 (GRiN)

Related hardware launched today: https://gpuminer.sapphiretech.com/Radeon-RX-570-16GB-Blockchain/

Used but factory complete, and fully functional of course, with transferable warranty for the EVGA GPUs:
BAIKAL Giant B BK-B ASIC Miner $50/each (2 available, PSUs available for extra)
https://www.ebay.com/itm/143326161816

11G-P4-6598-KR - EVGA GeForce GTX 1080 Ti SC2 HYBRID factory sealed RMA replacement $575
11G-P4-6698-KR - EVGA GeForce GTX 1080 Ti FTW3 HYBRID factory sealed RMA replacement $595
EVGA NVIDIA GeForce GTX 1080 Hybrid Gaming 8GB GDDR5X Graphics Card $369.99
EVGA Nvidia GeForce GTX 1070 Hybrid Gaming FTW RGB LED 8GB GDDR5 08G-P4-6278-KR x5 $299.99
EVGA GTX 1080 Ti iCX (actual pic shown below of what is being offered, not stock photo) $575

Used but factory complete in original packaging, fully functional, no issues to report, 10 year transferable warranty:
EVGA T2 1600W PSU $175 (2 available)

Will accept trade deals involving (and I pay you the difference if applicable):
2080 Ti

My eBay profile, notice seller feedback for recent GPU sales (send PM for reply): https://www.ebay.com/usr/snkusa
My eBay user name of snkusa.com points to my store: http://www.neostore.com/aboutus.asp
https://www.newyorker.com/tech/elements/the-unexpectedly-high-stakes-world-of-neo-geo-collecting

Solution/fix found: *Confirmed* Changing the PCI-E gen speed from the default setting of gen1 to auto and/or gen2 in the motherboard bios solves the 20 series install issues on both ASUS B250 and H370 Mining MBs.

Thanks goes to Someone_2 of the Ravencoin Community discord (mining section).

Except that, "For some reason, I can get up to x5 20 series GPUs installed on existing rig builds that already have up to x8 10 series GPUs that were already installed."  I recall that such installs often required multiple attempts to take, as in I'd have to try a different x1 slot of MB, but they eventually took, in the past. Stopped at x5 20 series because the rigs became x13 Nvidia GPUs, which is the Windows limit.

So, I've been able to install 20 series on x1 risers of both B250 and H370 Mining MBs of existing builds some weeks to months ago, but installing new 20 series GPUs on new/fresh rig builds on x1 slots has been 100% impossible from my end lately. I've tried adding one 10 series card to quasi replicate the past builds to no avail, even with a 10 series installed and used as video output to display, first 20 series GPU on x1 slot still won't install after dozens of attempts of trying everything under the sun that I can think of.

Recap:
I've successfully installed 15x 20 series GPUs into existing builds, this was 1 month or more ago tho.
12x 20 series are installed into x1 slots of B250 Mining Expert (quantity of 20 series per rig being x5, x4, x3, x1, each rig already had 6 or more 10 series installed)
3x 20 series are installed into x1 slot of H370 Mining Master (quantity of 20 series per rig being x1, each rig already had x8 10 series installed)

Remaining 2x 20 series are installed and running in new rig builds as x1 GPU builds successfully only when installed into x16 slot. Zero progress when trying to install any 20 series into x1 slot of new rig builds of either ASUS B250 Mining Expert & H370 Mining Master motherboards. I thought it was perhaps because of some Windows update that rendered recent 20 series installs into x1 slots impossible (as in over the past few weeks of attempts), or perhaps certain Nvidia driver versions, or a combination of both.

Lately, I'm finding it impossible to install new 2080 & 2080 Ti into ASUS B250 Mining Expert & H370 Mining Master motherboards. Trying to get new builds off the ground using only 20 series GPUs, and the only way a card will install is into the single x16 slot. When using a x1 riser, I get a black screen and ultimately a system crash requiring a hard reboot. Sometimes the system will reboot on it's own, only to repeat the cycle without completing a successful install by x1 slot. Cards are not defective. For some reason, I can get up to x5 20 series GPUs installed on existing rig builds that already have up to x8 10 series GPUs that were already installed (but that's after much trial and error by finding a slot that will take), but installing only 20 series GPUs into a fresh build has proven impossible from my end (and that's after dozens upon dozens of fruitless trial and error attempts).

Using latest motherboard bios (1206 for B250 and 1406 for H370).
i7 8700T for Mining Master.
7500T for Mining Expert.
16BG of RAM
Windows 10 Pro 64-bit
Samsung Pro 860 256GB to 512GB SSDs
EVGA T2 1600W PSUs
Riser versions tried: 009S-x, 009S-Plus, 009S, 008c
20 series brands on hand: Nvidia Founder's Edition, MSI, Gigabyte
Tried with no Window's updates after fresh reformat, and with all Window's updates.
Tried with latest Nvidia drivers and with past few Nvidia driver versions.
Multiple OS reformats from scratch.
Motherboard swaps.
CPU swaps.
Removed Ethernet cable for internet service during installs, and left with Ethernet connected on attempts.
Gave system over an hour for install to take on multiple attempts.
Only trying to install a single GPU by x1 slot before attempting a 2nd GPU, so leaving the x16 GPU uninstalled (unconnected).
Tried calling ASUS tech support without success. They opened a case and claim that their engineering team will try to replicate the problem. Weeks have passed without an update.
Sitting on x9 unused 20 series GPUs that I'd like to install this year if at all possible.

Has anyone else experienced and resolved this issue?

Background: I'm managing 29 GPU mining rigs that I built from scratch (275 GPUs). Currently, x249 GPUs are 10 series (mostly 1080 Ti), 26 GPUs are 20 series (x13 2080 /x13 2080 Ti).

Solution: Changing the PCI-E gen speed from the default setting of gen1 to auto and/or gen2 in the motherboard bios solves the 20 series install issues on both ASUS B250 and H370 Mining MBs.

Looking forward to watching this leading MW project grow. Looks promising with constant emission indefinitely, initial ASIC resistance for c29, and super lightweight chain efficiency.

I have only ever mined, never bought any crypto with fiat yet (other than the t0 presale), but have my coinbase account ready in case I get fomo: https://i.postimg.cc/Hnn2k6hd/coinbase-limits.jpg

Just like with credit lines, I suspect that limits are often evaluated based on usage.

Others and myself wondered the same thing, so I called and spoke to the ATF.  I communicated with an extremely knowledgeable specialist at the NFA branch of the BATF and explained that I purchased a transferable full-auto Colt M4 Commando Enhanced with 4 position selector built 1998.  I also explained how the general consensus from NFA dealers & collectors is to unanimously condemn this firearm as a mistake, how there's no way this could be transferable, and how this gun is a phone call away from the inevitable swat team confiscation.

The agent was already familiar and well informed of the situation with Colt's modernized machine guns that exist as transferables.  He gave me 39 minutes of his time by phone and confirmed much if not all of what I had already been led to believe by people in the know (private collectors with means, AKA the Syndicate).  The agent assured me that I needn't worry about this gun being reclassified as post-sample or being confiscated since the serials were registered prior to May 1986.  He went on to say that Colt did indeed enhance and remark some of their transferables and how never to take apart the 4-pos because of the complexity (this agent was very much a gun guy).  He said that the ATF isn't out there to take our guns away and that the blogs (implying forums) out there are almost always 100% WRONG in their assumptions.

I had also emailed him (and another ATF specialist) the original high resolution pictures that the seller/dealer provided me with and a link to this thread. I was instructed to include printed photographs along with a memo for the examiner and to instruct the examiner to contact this specialist if there are any concerns.

The original agent that was aware of these modernized Colt transferables was out of office at the time that my file was being reviewed and the examiner assigned was mighty thorough with her investigation, just as I had requested in my included Attention Examiner letter.  I have email confirmation from the examiner that the high resolution printed pictures & burned disc pertaining to this very Colt M4 Commando Enhanced, manufactured in 1998, were received to assist in the investigation, "We see an attached letter with a CD of photos attached. Also, noticed the folders have those same photos enclosed."  So now, in addition to the special agent that assured me of this Colt M4 Commando Enhanced's legitimacy as a transferable and guided me through the completion of it's form 4, I also have email records with the examiner at the ATF stating that they verified the records with Colt directly, "I have reached out to Colt and am just awaiting a response from them on the proper model designation to ensure we have that 100%. Often they designate “M4” as the model and the following content just being additional variant info."  After a 360 day wait, the approved form 4 indeed matches this Colt transferable machine gun exactly/perfectly/correctly, and I have absolute confidence & confirmation that this transfer did not simply slip through the system.

I realize that there will always be some non-owner skeptics that will never admit that a Colt transferable rarer than a standard M16A2 could legally exist and will stubbornly ignore all support/confirmations/blessings that the ATF provides to the contrary. This is the same illogical and yet familiar denial that some non-owners have for machine guns in general, by condemning them as overpriced toys that aren't worth more than their parts.

Since non-Commando non-Enhanced M4s insta sold at $50k a couple years ago (all sold same day and I have emails from the dealer (Targetmaster) as proof, as I made an offer of $100k for a pair and missed out), its safe to say that they were under priced. A somewhat better comparable, but still not on the same level, is the Colt ARC Test rifle that's hens teeth rare x1000, so rare that most collector's don't even know this gun exists, was limited to ONLY 12 in the registry, but good luck finding the proprietary ammo for it. I was fortunate enough to catch the listing and save a screenshot before it sold. Will probably be a decade, if ever, before we see another of these in wild again since a gun this rare likely won't leave a collection until there's an estate sale:

-source: https://www.davidspiwak.com/guns/

Another price point was based on my purchase price of $70k 2 years ago for the 1-off Colt M4 Commando Enhanced.

I'm aware of where transferables would be best listed as FSBO for a quick sale, and that's machineguncentral, sturmgewehr, & gunbroker.com, yet I posted the ad here and nowhere else. I deliberately listed under the radar because I'm on the fence about selling and not hyper motivated to let go of what would be best described as an irreplaceable collectible, but I am more excited about crypto at the moment than any other asset class and will honor the listing.

Don't you mean the, for there are no these when it comes to this model considering it's a 1-off (grand total of 1 in the NFA registry). Unless of course you're comparing this to those readily available M16A1s or M16A2s, but that's like comparing a collector's edition or Unlimited edition Black Lotus to the original artwork and considering them to be of equal rarity and value. For reference, I sold the world's most expensive Black Lotus: https://www.neostore.com/Alpha-Black-Lotus-PSA-DNA-Gem-Mint-10-p/1250.htm

A M16A2 Commando that was built as a Commando with factory Commando roll-marks is exceptionally rare and commands a hefty premium, yet one may surface perhaps once every few years. Then rare as hens teeth x10 would be transferable M4s, which insta sold within 24 hours at $50k each a couple years ago, and was likely the only time they have ever surfaced for public sale. Even rarer are M4 Enhanced (4-position). Then you have the one-of-a-kind Colt grail gun, which is the transferable M4 + Commando + Enhanced (4-position).

Video showing close-up of the factory roll marks of the Legally transferable full auto Colt M4 Commando Enhanced 4-position machine gun:
https://youtu.be/nG_Wt7pFJqo