The numbers don't lie - GPU prices have dropped, but not as fast as they rose.
It is worth noting again the dip in sales numbers relates to sales of GPUs into the channels; that's going down because the retailers are starting to realise they don't need to keep buying graphics cards from manufacturers, because they've got a bunch still sat in the warehouse and, with imminent next-gen releases, not all are going to sell.
At the end of 2021 we were looking at around $1,000 as an average selling price, while the numbers at the end of the second quarter—essentially the end of June 2022—were practically half that at $529. The other numbers worth noting is the difference between AMD and Nvidia when it comes to the volume of graphics cards the two big GPU makers sold into retailers over the past few years. On the AMD side you can see either the difficulty the company had in producing a higher number of cards, or that it chose to keep the numbers down deliberately. It's numbers are remarkably consistent.