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Kinda long backstory... you can skip to the bottom for the main issue. So I sold some mining hardware via good old craigslist. I got an email reply through the CL reply system with the buyer saying they were interested and to text them. We texted back and forth for a few days, and he seemed pretty legit. We eventually agreed for him to send a cashiers check to me first, then once the check was deposited and fully cleared I then ship him the hardware. The day he was suppose to send the check, he said he would be texting me the tracking info later in the evening. At that point he stopped responding, then finally popped back up asking if I received it 3 days later. After this delay I was pretty sure it was a weak scam attempt, but he then followed through with the tracking number, and saying how he "had a slight accident and was hospitalized"  . Turns out the check had just arrived in the mail. So I open the USPS priority envelope, and inside is a naked check that looks like a paystub, not the agreed upon cashier check. It has a company name and address, and the issuing Banks name and address. I checked online and both the company and bank match the corresponding addresses. I questioned the buyer about the company name and he said it was his place of work. He assures me its legit, and told me to go ahead and deposit it, and he'll wait until it is fully cleared before I ship. Which brings me to my main question. I will go ahead and deposit this check tomorrow, Say it is legit, the bank verifys it, and it ends up clearing... Could the buyer somehow have the ability to reverse a cleared check?
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Looking to possibly sell (4) Antminer L3+ September 21-30 batch pre orders. All include the APW 3+ PSUs. These were ordered and paid for early July. Please PM if your interested. Thanks ! 
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 Hey there, Im selling BTC / ETH / LTC at competitive preev rates, as well as buying. Selling Payment methods accepted: Cash Deposit Cash through mail Western Union/Monerygram Paypal (smaller amounts and/or to only very trusted members) Skrill OKPay Chase QuickPay Square Cash Visa / Master Card / AMX / Discover Bank transfers Bank wires other Alt coins Escrow and Local transactions PM me for current preev rates. Buying payment methods: Cash Deposit to any US bank Paypal Skrill OKPay Chase QuickPay Square Cash ETH/LTC I will cover escrow fees. Thanks for stopping by! 
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1 BTC for Chase QuickPay.
Looking to buy from reputable member, or escrow.
PM if your interested. Thanks.
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I will be building some rigs and Im looking to buy as many GPUs as possible.
Mainly interested in: Radeon RX 470, RX 480, R9 HD 7990, and R9 295X2.
Paying in BTC or ETH.
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Hey there, Im looking to buy up to 5 Antminer s5's, preferably new in box. Let me know, thanks!
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Selling TWO identical 3.5MH/s Scrypt Mining rigs, these were recently built from all new parts and only ran for about 2 weeks. Escrow through any reputable Hero member. Im in SoCal so we can arrange a local pickup, or I will cover 50% of the shipping fees. Post or PM me offers on One or both if your interested, Thanks! Specs: (4) XFX R9 290s 1300w EVGA Supernova 80 Plus Gold PSU ASUS M5A99FX PRO R2.0 Mobo AMD Sempron 45 CPU Kingston 8GB Ram BAMT/Linux OS Custom black anodized Aluminum Frame w/ PSU Bracket       
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Im looking to purchase 2-2.5btc (Coinbase/stamp rate) via PayPal hopefully by tonight. Im a trusted member and have a solid ebay (cdizz7) and verified paypal account. Post or PM if you have at least 1btc available for sale. Thanks!
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Looking to buy 1-10 Antminers ASAP. Please post or PM if you have any available.
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Looking for a verticle aluminum frame that has room for 2 PSU's and 6-7 GPUs... Post pics if you have any, Thanks.
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So I have a rig running (4) XFX R9 290s for about 3.5mh/s. I was just wondering what are the optimal cgminer settings for these 290s. Right now they are all running around 83-84 degrees, is this too hot or are they suppose to run this hot?
My settings are: GPU: 1000 Mem: 1350 Intensity: 20 fan speed ~75%. (auto)
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I need a +1300W PSU, preferably EVGA but any reputable brand +80 bronze will do (not over $250). I would also maybe take multiple 1000w EVGAs. Let me know if you happen to have any for sale, Thanks!
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Is there a list to the best alt coin pools? Preferably for Doge, Tag and other profitable scrypt coins.
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So I just built a 6 280x rig, with a Gigabyte 990FX motherboard. It powers on just fine soon as I hit my powerswitch, but I cant get anything to display on my monitor. I have a newer Acer monitor with an HDMI cable connected to the first GPU, also have a keyboard plugged into the MBs keyboard port, and a mouse in the USB 2.0 port.
Ive tried a DVI cord as well, but the monitor still wont recognize that any cable is connected. I just need to boot into BIOS so I can start setting that up. So what else could I do to get the monitor to recognize?
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If your looking to sell your KNC Jupiter before the pre orders start hitting the streets, let me know your price!  Escrow of course, and shipping to California..
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Are there any guides on how to build a vertical aluminum frame for a rig?
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I am trying to determine the GPU mining profitability for the next few months, Ill probably be using a coin switching pool with about 15-20MHs. As of today coinwarz has TAG coin the most profitable, at about .0285/day per MHs (Doge at .0151/day per MH). I understand the volatile variables that come into play when choosing the most profitable alt coin to mine (price,diff level etc), but how can you estimate what 1MH/s can mine per day say 2 months from now?
If these coin switching pools are always switching to the most profitable coin, and new coins are always being released, what could be the biggest hit to the value of 1MHs of GPU mining power in the near future? I know the most obvious answer's when scrypt asics come out, but Alpha T still looks like its months away.
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Looking for a few 1500-1600W PSUs. Decent brands, and in good 100% working condition. Please post or PM me your offers. Thanks! 
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I already saw a few guides on building your own rig, but are there any other guides for building a 10+ MH/s rig?
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