a guess is bike shops that closed...but the owner has a bunch of stuff in the garage/storage etc.
I guy I knew in high school made a pretty good business of obsolete GM parts. He would go to every little town in Montana (remember there used to be dealers in even very small towns) and find cosed down GM (chevy, pontiac, buick etc) dealers/garages and make site unseen offers on every part. Many time the dealers had just closed up, but the building and parts were still there.
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Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)