As great as ebay is at driving traffic for whatever you are selling their listing fees, gallery fees, store fees, final value fee will take a bite out of your buck eventually. Ebay is probably one of the best ways you can drive traffic quickly today, its by far the dominant auction site with the most buyers and sellers. They are almost without competiton, or any worthy competition at least.
But here are some other auction sites if you got the time to test around. They probably won't generate nearly as much traffic as ebay, but their fees will be way lower. Such as like Ubid which only charges final value fee i think so you don't got anything to lose unless you sell something. You probably get 50 sales or so to 1 at auction sites like Ubid but hey a sales a sale and if you got the time for it, give it a try. You got notthing to lose anyways and maybe one day ebay will have a worthy competitor.
Ubid.com
AuctionMonkey.com
AuctionQuest.com
Webidz.com
Biddersnsellers.com
HiBidder.com
PlunderHere.com
DealGates.com
there are many alternatives you can try free classified posting online like craigslist,locanto or gumtree those are free classified ads online that allows you to post your ads for your products or services you offered, it also has different category to choose from or you can find any free actions site in google.

