I used to collect stuff from Thrift Stores, but I don't really do that much anymore. Some items I remember buying are; an old basic calculator from the 70s with a 9V Battery Compartment, New Edition's Self Titled Second Album on Cassette, and a stack of envelopes and cards.
There used to be two thrift stores a few towns over from where I live, Good Will and St. Vincent De Paul, but the latter went out of business because it couldn't handle the competition of other thrift stores.