Broken GPU's sell for about 80-90% of the price of working GPU's. There must be next to no profit these days, in trying to buy broken GPU's, and fix them and sell them. The market is that screwed up. Between scalpers, miners, the supply chain shutdowns, the duopoly of Nvidia and AMD, and some big retailers, they have made GPU's largely unavailable, and unaffordable, to the average poor working person, let alone kids/teens that might want to save up for a GPU.
Wow I thought about this yesterday ?