It's been about 5 years since I last used ebay. I'm selling a breast pump, the completed listings I've looked at are all over $100. My auction has 3 days left and has been bid up to $70 so far. I've just had an email offering to buy it for $50 and collect it over the weekend. Obviously this is really cheeky, but why offer less than the current price? Are there some fees that I don't know about??