Where can you sell a used MP3 player other than eBay?

Answer

Usually, depending on the city in which you live, the local newspaper will offer free add space for things for sale. Provided that the item is less than a certain amount. In the paper where I live if the item is for sell at less than 250.00 then the ad space is free. Also there are "flyer" and "bargain" trade papers which offer free space for low price items. Also if you have access to a printer you may wish to print up flyers and post them ( with permission of course) where ever teens may hang out. There are other options I'm sure but maybe this will help you get started.

Or you can try a site like www.wornoutwidgets.com