I will have to say, nintendo games have incredible resell value

Because Nintendo never drops price or puts anything on sale while its "current" and then barely re-releases anything until selling it at an absurd price later on their e-shop or as a full priced remake.

Which is then compounded by the fact that "collectors" are currently hyping up a huge bubble on retro games and have driven prices so high through legitimate manipulation tactics that Nintendo games literally increase in value overtime despite that not making sense.

The only reason people don't complain about this as hard as they should is because Nintendo also makes the easiest consoles to emulate, so basically no one even bothers buying their older games to begin with.