They will sell and have been. Find a 4090 in stock. Even the 80s are selling and they are the reciprical of the last generations 90 to 80 value prop. There is 1 model of the 80 in stock at my local MC otherwise the same lack of inventory. The AMD cards will be out of stock as quickly as they come in. People have been bitching about GPU prices since the dedicated gpu came to market. I had to save a ton and beg my parents to match for a bday or something to get my first 3dfx card, a Voodoo powered Creative 3D Blaster. It was amazingly expensive and awesomely powerful.
Where have you been the last 30 years? 😉
(BTW the 4090 is amazingly expensive and awesomely powerful, have one myself but didnt have to ask my rents this time hah)