I have about 400 78's, 300 cd's, 400 records mostly classical, some jazz. and Half of my collection is still in europe with a friend. I really don't have alot, but I have had the good fortune of having alot of exchange with friends and colleagues who are composers, conductors, in the recording industry, performers, managers, who are passionate about music and we frequently exchange our latest favorite recording, or ones we don't like.
I don't "collect" But I do have friends who are serious collectors- I have this one friend who has 10,000 violin recordings alone-incredible resource. I've bought many recordings over the years, but if I don't love it, I usually get rid of it.