thanks sarah&effy, I sent him the link and I asked him to explain why I paid 9 pounds for the shipping (ah after years, I need the pound sign on my kybrd, unfortunately it's been replaced by €). he already left a positive feedback for me, but if he doesn't have a good excuse for the overcharge or return the difference, I'll definitely not leave a positive feedback.
I wouldn't be so pissed if the board was actually a 2mb or 8mb expansion though ...