Selling on ebay

It cost to list any item, price varies on starting price/buy it now and reserves. Once item sells you are charge a final value fee, could be as high as 8%. If item doesn't sell you can relist and if it sells the second time you dont get charge the second listing fee, if it doesn't sell you are still charged.
They also have a five free listings every 30 days deal but they jack you more on the final value fee's, 8%.