When did you win?
The seller may be away if its only a few days.

He may be having trouble finding out how much to charge for postage.

I won an item (I was the only bidder) in November, emailed for total cost, heard nothing. emailed again, got a reply to say he was too busy to go out and check, then 2 weeks later he said transfer item cost and he would post and let me know the extra.

I got the item, he never asked for postage cost and apologised for delay on feedback.