I bought a used PS3 back in 2017 and a whole bunch of PS3 exclusives. The games were dirt cheap back then. I got some of them for $10 or less. They only went up in price when you started looking or new factory sealed games which I bought a few because the used ones had issues. It's funny because the used PS3 games I bought were in no better shape than the used PS2 and Xbox games I used to buy like 15 or 16 years before. It was kind of depressing to flip over a ps3 game and see the bottom of it looking like roaches had ice skated on it.
I don't know how much they are now though. I do know that Nintendo games are always expensive. Especially first party titles and Pokémon games. People think that shit is gold or something.
I have a few collections. Blu-ray movies games and so on.