Obviously, content and condition determine the value of any used records. If you have the Doors or Beatles in good shape, sealed in plastic to protect the covers, they're worth much more than 50 cents. The proof for me was the four guys sitting outside my house for an hour prior to my vinyl garage sale. Each of them bought $100-$200 worth of 60's/70's vinyl, most around $5 each. Again, get some advice from a used record store, or the internet. You might have a treasure.