I have a garage full of 1960s and 1970s Suzuki motorcycles, unfortunately most of them are not in running condition at the moment - I've found that with old vehicles the more of them you have, the less time you spend with each one, until eventually you do nothing with all of them.
The most insidious collection is old car magazines; I have tons of them sitting around in boxes, and probably 10% of them are worth keeping. Otherwise I have a lot of old stuff, but not enough of any one thing to amount to a collection - old radios, old tools, 1960s AMT models, various old toys. I've played the trombone for more than 40 years, and spent most of my adult life playing in various amateur concert bands and orchestras, but I kind of burned out on it a while back and have been on hiatus. One of these days I'll dig it out of the closet and get back into it.