Just apply the used car market philosophy. Not that you will get it. Basically once its off the forecourt its halved in value! I dont think anyone would want a revved out ex-miner card, not to game on anyway. The fans wont be great and the owner could have abused it somewhat regarding high temperatures etc. However it is what it is and if your after better prices - as the last quarter has been horrific for a buyer - then use the advantage and try to wait out some better pricing offers.