A few, a silver Pikachu Gameboy color, some synthesizers from the 1980's, a unique guitar that I've only been able to find documentation of 1 other one online (Ibanez Nitro full wood body finish - it's certainly a custom). And I think the last pride and joy is my Sony MDR-V600's.
Anybody remember Cube World? Those little electronic cubes that you could magnetically attach to others and they could interact? Got a set of those too.
The music stuff is the oldest but it's mostly second hand so it's harder to claim. The headphones were a gift and new back then though, so they're for sure, same with the Gameboy color and Cube World. Heh :)
Ah I guess some made it sound a little cooler than it is, my apologies for the hope!! It's just a Casio HT700 that I got at a thrift, it's not bad but it's not anything super special.
I had bad syntax, I have some aged synthesizers, one from the 80's... That's the only one lol, I think my others are mostly from the 2000's, like the gakken sx-150 and the midiman oxygen 8, an Ibanez Bass Synthesizer pedal (SB7). Oh, speaking of pedals I do have a Snarling Dogs Bootsy Collins Wah/Fuzz which is pretty neat!