Pennsylvania's Precious Metal Sale Regulation Law of 1984 (73 P.S. 1931 to 1942) covers anyone who buys gold, silver or platinum items from the public to resell or refine, including jewelry and silver services. Gold counts at 10 karat or finer, silver at .900 or finer and platinum at .750 or finer. Coins, ingots and bullion are excluded, as is anything under 5% precious metal by weight, so a coin sale at a Pennsylvania shop involves none of this. Each dealer needs an annual license from the sheriff of every county where it buys, and buying without one is a third-degree misdemeanor.
At the counter the dealer records your name, address, age, sex, race and driver's license number, and checks a government photo ID, if you have one, plus at least one other piece of identification (37 Pa. Code 501.6). You sign the form, which also lists every name, initial, serial number or other mark on each item and the date and time. The dealer keeps it 1 year and sends a copy to the county district attorney, or the local police if the district attorney allows it, by the close of the next working day.
Each item then stays at the shop, unaltered, for 5 full working days after that report is filed, and police can extend the hold 7 more days with written notice. A minor can sell only with written permission from a parent or guardian, which the dealer must confirm, and then waits 3 full working days for payment. The act sets no rule on how adults are paid. Some cities and townships add their own ordinances, so check local rules too.