eBay has announced a new fee structure as of May 1.
If you sell on eBay every now and then or perhaps as a hobby, you’ll be able to take advantage of 40 free listings every month, free addition of a Buy It Now Price to any Auction listing and free Scheduled Listings. Final value fees for successfully selling an item will increase to 9.9%.
Listing fees for the 41st listing each month and beyond will also change; Fixed Price and Auction listings with a Buy It Now or start price of $100 and under will be $1.50 each, over $100 will be $3.50 each.
Full list of new fees here: http://www2.ebay.com/aw/au/201304.shtml#2013-04-02100941
Still better than gumtree.