You haven't given us much to work on. For example, fees go up if you list in more than one category. Then there are many "upgrade" fees for having a featured auction, bold type in the listings, etc. Different categories charge different fees. Here are the eBay fees:
http://pages.ebay.com/help/sell/fees.html

If you look at your seller's account in My eBay, you'll see the breakdown of all the charges for your auctions -- in great detail.

Incidentally, if you use Çhase Bank's QuickPay instead of PayPal there are no fees at all (to the buyer or seller) -- the free service transfers funds between accounts -- fast, safe, free and easy. Only one of the two parties need have a Chase bank account. Can also use credit card charges for payment -- all free. You could email me for details. Or go to
www.Chase.com/QuickPay

Robert