Have you already completed the NES and SNES
I don’t have much of a connection to those systems so I just have a handful each.
Plus each system had their nostalgia pushes already so there’s a bunch of games in the if I spend that on a game my wife would kill me category.
With the N64 the most expensive game is Clay Fighters Sculptors Cut, which was a blockbuster exclusive. COVID drove up the price on that one a ton and it sells for like $1,200 now. I got it a couple years ago for $300.
For NES you have games like Little Sampson that’s like $1,700 or Bubble Bath Babes that’s like $1,300. If you want a full full set then there’s Nintendo World Championship which is like $18,000