There is a lack of graphics cards on the market. I bought the RX580 8GB Aorus graphics card three months ago, then it cost about 313Eur. At the moment, the same card costs about 482 Euros. The price increase can largely be attributed to miners. They buy a dozen or so cards and connect them into one huge computing machine. It is not expected that card prices should fall. I note that these prices are for Poland.
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From @michov115