Thanks for the replies.
It's terrible to admit but I'm actually afraid of ebay! When I first joined I wanted to see how the bidding process worked but didn't actually realise I was making a bid (stupid, I know) so I ended up bidding about €150 for a cr*ppy fake gucci bag - I thought it was real at first. Then I freaked out when I realised what I'd done and managed, after a while, to cancel my bid. I've avoided it ever since as I'm afraid I won't be allowed make any more bids!