What is a reasonable price to buy second hand 1080 ti? 650 USD?
299 usd, gtx 1070 will be faster than gtx 1080 ti and it might cost $399.
wut....for real. i wanna try buy that...strange why high low and low is high. mean version 1070 is faster than 1080

dont mind that idiot. he's just a troll that gets off by feeding bad info to miners. he doesnt know anything about mining.
a GTX 1080ti in the current market will go for about $550-600, less if you find someone wanting to just dump it. but thats the average going rate ive seen on reddit.
a GTX 1080ti should get about 50MH/s on ETH (most profitable) with the ETHlargement pill.
a GTX 1070 in the current market will go for about 300-350, and will do about 30MH/s on ETH.