Double mattress - brand new for sale

I bought this double mattress but got the wrong size for bed frame - it will cost me more than it is worth to return to the depot in Yorkshire, so am offering it for sale . Details  and spec are  at this link http://www.silentnightmattressonline.co.uk/Product/Silentnight-Rio-....

It's 6'3 x 4'6,  unused and cost me £219 - I would accept an offer around £160.