As I've mentioned, lots of musical instruments and accessories. Also (unlike DVDs) the customer can test/try out a drum set, guitar, amps, etc. I guess when a band breaks up, upgrades, of if someone needs the money fast, a pawn shop is a good route to go. I'm no expert, but the guitars were quite attractive.
Actually the jewelry also looked nice - just that I personally didn't see anything that struck my fancy enough for me to part with money in excess of what I allowed for shopping that day.