GPU prices started going up (roughly) in March of 2020 when all hardware went up in price or went out-of-stock. It happened slowly at first, then faster and faster, until widespread unavailability became the norm!
During the worst of the worst, it was so bad that you could not buy most graphics cards, no matter what price you were willing to pay! I am very glad that the worst is over.
But we aren’t out of the woods just yet.