Making everything easier, I would just invest into ASIC miners. The resale value isn't there if you can't use it to mine anymore, but that won't be an issue for years. Also the return on investment for ASIC miners, if you can get them at list price, is 2-3 months, which is insane. Here's a short list of ASIC miners and how much they make a month compared to Miningstore.co's GPU miners:
Antminer S9: $262.32 (BTC)
Antminer T9: $203.87 (BTC)
Antminer R4: $163.71 (BTC)
Antminer S7: $16.92 (BTC)
Antminer U3: $-3.73 (BTC)
Antminer C1: $-41.93 (BTC)
Antminer D3: $2,177.31 (DASH)
Antminer L3+: $510.57 (LTC)
Miningstore Imperium: $229.41 (ETH)
Miningstore Nexus: $195.55 (ETH)
Income Rates set for the market prices at 11:05 EST 9/19/17
your calculation is totally wrong
2-3 months ROI ?
as of today , 9/19/2017s9 is 1288$ + psu is another 105 $ shipping for both is around 80$ + custom fees = so one s9 with psu you can get for around 1473$
+ your country custom feeswith your calculation 262.32$/months is going to take 5.6 months with current difficulty , but all of us know the difficulty is growing , ROI will end up somewhere around
8-10 months let see the l3+
L3+ is 2280$ + psu is another 105 + shiping is aroun 80$ + custom fees = 2465$
+ your country custom feeswith your calculation 510$/months is going to take 4.8 months with current difficulty , but all of us know the difficulty is growing , ROI will end up somewhere around
8-12 months or more as bitmain just shipping out soon a lot of l3+:)
there is only a few d3 out there at this moment , wait a month and do your calculation again
if you have a d3 right now within a months you can get your ROI
if you getting next months...who know howw long is going to take
AND ANOTHER IMPORTANT NOTE , IF YOU ORDERING ANY OF THOSE MINERS RIGHT NOW , YOU STILL HAVE TO WAIT 1-2 MONTHS TO RECEIVE THEM , OR PAY A PREMIUM PRICE AND GET IT FROM EBAY OR ANY THIRD PARTY SELLER, BUT THEN YOUR ROI WILL BE 2-3X TIMES LONGER , DIFFICULTY WILL BE MUCH HIGHER EACH MONTHS