You sold, if you don't honour the sale, expect to get bad feedback and being reported to ebay as a Non Performing Seller, and you still pay the 10% Final value Fee..
How can it possibly be an insult, you listed at 99p, if only one person had bid it would have sold for 99p.
Never list at 99p if you want more list at a price you would be happy to sell at. You can't make bidders pay more than you ask, and even if the winning bidder placed a bid of £100 unless someone else bids it will not go any higher than £7.50.
