Top Tips For Selling Your Stuff On Ebay
Reserve prices will give you some insurance
You might not want to sell the item if it goes for less than you intended so by adding a reserve price you are not obliged to sell the item. Reserves are only available for auction listings and you can always change the reserve price depending on the success or failure of the listing as it goes on.
For expensive and rare items, adding a reserve price will stop you from having to give it away for nothing.