Shouldn't the pawn shop be responsible for refunding your money? They did sell stolen property after all. GA law is pretty specific about selling stolen property and "I didn't know" is't an excuse especially for a business.
Georgia Law on Theft by Receiving Stolen Property
O.C.G.A. §16-8-7(a) states a person commits the offense of theft by receiving stolen property when he receives, disposes of, or retains stolen property which knows or should know (they are required to report the serial number just for that purpose) was stolen unless the property is received, disposed of, or retained with intent to restore it to the owner. Receiving means, acquiring possession or control or lending on the security of the property.
Georgia Law on Theft by Receiving Stolen Property
O.C.G.A. §16-8-7(a) states a person commits the offense of theft by receiving stolen property when he receives, disposes of, or retains stolen property which knows or should know (they are required to report the serial number just for that purpose) was stolen unless the property is received, disposed of, or retained with intent to restore it to the owner. Receiving means, acquiring possession or control or lending on the security of the property.