So, here's what you need to consider.
Price per GH
Watts per GH
Resale value.
I have been mining with SP-Tech equipment since SP10 (bought in March) and I am STILL running those SP10, alongwith my other SP-Tech miners.
I have found that the customisability of the miner (downclocking) is second to none. I am running each of my old SP10 at max 833watts and getting 1.2TH/s
That is still a profitable miner - EIGHT months from the date I received them. Of course, they have paid me back the purchase price long ago.
I'm now mining with the SP20 and I am underclocking these also;
745watts mining at > 1.35TH/s - i worked out that these will still mine profitable right up until difficulty hits 100billion.
If I were to sell on my old SP10's I'd easily get a decent price for them.
Spondoolies, somehow have created the most efficient, most stable and most trustworthy miners, ever.
If you want to test the stability on any pool, you can rent my SP10's or my SP20 here;
https://www.betarigs.com/user/raskuli'd advise you contact
sales@spondoolies-tech.com if you are looking to make a bulk purchase and find out if they might do a bulk discount for you.
They might give you a discount code that you can use to purchase from their website.
please use my affiliate link to buy when you do, and help a fellow miner
thanks.