Yogi449 is right, and the link he provided is on-point.
If your sales are the online equivalent of an occasional garage or yard sale, you generally don't need to report income from those sales.
This applies when you originally bought these items for more money than you've sold them for. When this is the case, you don't need to report the income received from your sale on eBay or elsewhere.
Please see the TurboTax blog A Tax Filing Factsheet for eBay Sellers and the Help article Do I have to report personal items that I sold? for more information.
