Since you want to avoid eBay, presumably because you don't want to pay a percentage in eBay/PayPal fees,
you might consider setting up your own auction page or auction site.
Can't vouch for any of these, but just to save you some time searching for free auction software on Bing or Google,
you might want to look into these apps/services, which seem to be free to use:
https://auctria.com/Az/Account/SignUp
https://www.32auctions.com/pages/pricing.html
http://www.biddingowl.com/
Those links are mostly the pages showing pricing scales for those services, for quick reference, but each of those
links to the homepage and more information for each service.
If you do set up your own page/site, some good tips here:
http://www.stepbystepfundraising.com...dos-and-donts/