finding old music in used record stores [yes there are still a few around] and pawnshops and goodwills and such. I recently found several albums of john klein on the carillon Americana accompanied by orchestra/choir as well as solo. also found a very nice album by laurindo almeida called "classical current-electronic excursions" which is absolute ear candy! another find was a very rare album by the late jazz harpist daphne hellman.
There is a record shop in Nashville that I frequent that just added a whole new building specifically for their used LPs and CDs. It is heaven and it takes a lot of self-control to not buy them out!