Junk dealers in Florida, are required video tape of all transactions already. Vehicle on the scale with license plate, seller of the goods upon receipt of check. No CASH. Sounds like BS I know, but... my neighbor down there is a government disposal contractor, and he buys scrap on military bases for resale. Had a bunch of it stored in cargo containers on the property. Some of it borderline of classified material, contract demands some of these items be disassembled and or destroyed before salvage.
While he was working out of state, 2 - 3 of the little dipsh|ts in the neighborhood cut the lock off one of the containers and hauled off about 10,000 pounds of it, a pickup load at a time. Bill probably won't ever get his money back, but they were caught. Video at the junkyard is what eventually nailed them. Evidence at the scene led them to the suspects however, the way the court works in today's world, you have to catch them in the act. The video shows them selling the goods, when they cash the check, they complete the transaction.
While it's easy to say the dealers shouldn't have to do the police department's work for them Ben Jimmy, if it was your household items, or your guns at the pawn shop, or your trailer or an old pickup with sentimental value that went to the scrap yard, you'd probably be happy they are required to do such.
With scrap prices where they are today, it is very tempting to deliver goods to the junkyard.