hey there, I have some sort of investment situation here. someone has 18 high- and low-end gpu's for sale, but they are all defect. they give no signal or the fans aren't working after the person has had these laying around for years. so now my problem is, how big is the chance that i could fix some of them? the bundle contains 2 980's and 280's and only costs 114 euros. and if I wouldnt be able to fix the cards but they would be recognized by the system, for how much money would i possibly be able to selll the for example 980's as mining cards?