I'm stocked up on new 7 and 8 speed cassettes and some new and NOS chainrings for 5- 6-7 speed bikes. I'm also flush with chains, Tubes and brake pads, bottom brackets and other stuff but that's from running into penny on the dollar deals. Vintage spares are primarily still "on the hoof" in my embarrassing pile of donner bikes. I had a good run at the scrap yard with an average bike cost of $12. I have been a bit over focused on collecting vintage "compact" square taper cranksets, on the hope of future proofing my knees. This is slightly separated from tendency towards hoarding, which I acknowledge, but don't really think it's a problem if I have more bikes and junk at home than the co-op.....