I've seen enough people complain about how bad vinyl prices have gotten I feel like it's my duty to warn you: the new thing is CD collecting. We are, today, where vinyl collecting was in 2009.
CDs are still cheap in a lot of music stores and thrift stores, but expect to see thrift stores get more picked over in the coming years and used prices to start climbing as the revival gets in full swing. If you ever thought there's stuff you'd like to collect yourself, no time like the present.