There are two basic functions to pawn shops. Pawn shop gives loans to those people who are strapped for cash. The person needing the loan brings in valuables, typically jewelry, and then the pawnshop loans out the money. The Pawnshop holds onto the goods until the loan is repaid.
Pawnshops also buys and sells goods from people looking to just unload unwanted things. We are generous in our loans and we always sell everything at a great and fair price.