I have used iOffer.com a number of times without problems.
If you want to buy and sell arts and crafts (that you produce yourself) www.etsy.com
is nice - and you get a shop front. It is also a lot cheaper than eBay but you can still use PayPal for payments if you wish.
If you want to see an ETSY shop I have a friend who recently set up the following shop to sell watercolour and oil paintings and prints:http://woodhousestudio.etsy.com
He hasn't sold anything yet so if anyone wants a nice Christmas present check out some of his prints of the Yorkshire Dales. (they are very nice quality).