Troublesome 12

Dorothy demands an explanation when Tony sells one of her LP records, which is a 'rare' collectors' item worth £200, which is green in colour. Gary has to find a replacement! - The replacement LP is black, so Gary tries to paint it green! When Dorothy is not convinced, he has to pay her £200. Then, Tony tells him that there was a misprint in the catalogue - the green LP was only worth a few pounds!!!