That is a stupidly good price for a 2080TI right now. If I could confirm it was in fact a working 2080Ti and not a scam as you mentioned, I'd snap that card up fast.
If the card works, its highly unlikely anything will fail on the board this late in the game. The most abused component on there will likely be the fans/heatsink/paste, all of which are not costly or difficult to replace if need be.