Are you looking to sell items on Ebay? If you are, do a little research first. There is a terrific site called Mpire.com that offers a lot of tools that you can and should use even if you are just looking to sell one item.
You should use the researcher prior to selling an item. The data that you can get for free will tell you the best description to use for your ebay item, the best time to start and end the listing, the price to start at and any additional features that you should pay for (gallery, bold, etc).
Mpire is able to do this by analyzing past Ebay sales data. Ebay opens their data to developers and Mpire is an example of the tools that come from this open access.
Visit Mpire.com before you list with Ebay.