Rx580 and 570 will be the most sold cards on eBay and everywhere because they are at the last circle of their lives, I might be wrong though buts I remember seeing the cards on eBay for 95$ lol.
Is it worth building mining rigs with rx580 GPUs after 2021?
While Ethereum runs on the POV algorithm, the 8GB Rx580 and 570 will be the most popular and mainstream graphics cards.
Ethereum determines the price of these video cards and the demand for them.
The developer's promise does not tell us the exact date, so it is very difficult to make predictions now.
In my country, they are sold for $ 500, and this is the price for used video cards.