currently my trucks, which are a little over a year old.
i got tons of old shit on deck just in case. refurbished old bearings and indy hangars and baseplates of various stages and sizes. a bunch of bushings and a couple wheels which have been skated but are flatspot free and barely run down. just not f4 99s which is why i don't skate these. one pair is some 97a green jelly ojs i bought for skating indoor parks, but i never go there and skated them once maybe. they were just as slippy in the wooden ramps as regular wheels if i remember correctly, but rode pretty nicely on the pavement. i just cleaned up a bunch of stuff and wanted to build a winter board with these weird ass wheels. they must be about ten years old now but look brand new.
i don't keep a stack of decks, i have a couple old ones that i could ride if i had to though. pretty sure all my wallhangers are rather brittle by now, and apart from the scumco ones, all of them were warped as hell to begin with, otherwise i wouldn't just had them hang on my wall.
technically i own a piece of grip gum that i have been using since 2003 or 04. i think my skatetool is a bit newer than that.