Go on then. Make me an offer. Assume you will pay three pounds for postage. Nobody wants it at £7 equivalent at the moment. Come up with a reasonable amount for a clean, hardly used bouyancy aid. Warm, hard to damage and ideal for something handy for an occasional vistor to your craft.
How can you afford not to have one!
Best offer including £3 postage, by Friday the 27th gets it.