yes u pay ebay an insertion fee and also a selling fee if the item sells, the amount depends on the value of the item if the item doesnt sell u can try to resell it again without paying an extra insertion fee, but if the item does'nt sell second time around then u pay the insertion fee which is around 25p for items under £25
U can also choose the duration of the advertisement, 3 5 6 or 10 days
if u need any more help pm me, as I have sold on Ebay
hope I cauld be of use:)