the first post to this question had bad info, Ebay will charge you 10% final fees on both the final selling price and postage if you charge the buyer postage,not the 15% the other person said there are no listing fees at present if you do an auction format and only list in one category, you can also put a Buy-It-Know on the auction for no extra fee's.
Pay Pal will charge you 2.9% plus a .30 cent fee.
I don't know of any other problems you might have.
I have been selling on ebay over 15 years with no problems.
Walt