x2 on childhood games. My Goldeneye 007, Mario 64 and Perfect Dark maxed out with all of my childhood unlocks are the items most dear to me in the collection.
But some of my more unique items:
Conker condoms, stickers, urinal cover (sealed)... got the Press Kit / whoopie cushion / coaster set (4 different ones) too:
Rev A / Rev B Test carts. Rev B is incredibly rare, less than a handful I'm aware of.