Martin Kyte…… No need to smelt or store coins, my guess, he sold coins to those who wished to purchase them for more than face value. Dealers,collectors,those who simply wanted an old coin. His only action would be to sort by individual mint, year, condition and sell, knowing that he can return any non wanted coins to bank
Should you wish you could do the same in the UK. There have been more than 60 (And counting) design variations on the 50p coin issued in various quantities (Did you even notice?) collectors will pay a premium over face value for the best examples.
1p and 2p coin of the right type can be of interest to collectors, but don't expect us give the game away😜😜😜