Ah, all the more reason to haunt junk shops, thrift stores, flea markets and the like. Of course out here in Pittsburgh we don't get a blasted thing from anyone "known" or "famous" at yard sales unless one counts local actors from George Romero horror movies, which are usually filmed here.
I keep hoping to stumble on something from a musican who touted through Pittsburgh and left behind something on a train or in a hotel room, and the battered book or record winds up at the flea market.