well, as lee said it's pretty clear what happened - tommy put the wrong picture. that mappin&webb in the picture was listed few days earlier and sold for a bit more.
it seems that at this point the seller offered the best he could do to rectify the situation - a full refund.
of course you don't get the great deal that you were hoping you would get, but you could've asked the seller before the auction ended about more details. quite likely he'd have realized that the picture was wrong and put the correct picture. or if it was indeed a mappin&webb flying under the radar it might have attracted attention and hiked up the price.
so the way i see it - you were hoping that taking the risk would end up in your favor, but this time it didn't. the seller is offering full refund, so that's all more than fair.
that's just the way gambling works - you don't get to win all the time :)
there have been few mappin&webb razors in the last few months with good descriptions, pictures and clear identifications - none of them was sold for $15.