It was tried back in the 80s, and those guys went bust. I sold a handful of change I'd swapped out of the cash register and a class ring I'd found, and I got about $250. For junk silver, they were paying 20 times face value, so a dime sold for $2, which is less than the current price of silver. I wish I still had that silver, but it was an offer I couldn't refuse at the time.