Hmmm... We are talking about selling used video cards here. This is how it works for 99% of the use cases. Sure if you may find a company that has a blender render farm using 12 2080tis that want to keep them all the same and is willing to pay a little extra for the consistency.... This one person (few people) is not going to keep prices high. Sure when stock runs out prices on new old stock may go up, but nobody here is dumb enough to buy one, which is the target market were talking about. I can say with pretty high confidence at the end of the year you won't be selling to many used 2080tis for MORE than an equivalent ampere card. Is it possible a couple may? Sure, but it won't be the norm.
Yeah I was referring to parts sitting on shelves. I don't know what will happen with used 2080 Ti's but a 50% price cut seems unlikely. It would be great if the $800 Ampere card puts it to shame but I wouldn't bet on it.