If you have an old unwanted phone that you are trying to get rid of eBay wants to help.The online reseller just launched ‘Instant Selling. ’The new service on the website allows users to list their old phone, upload photos, and then receive a voucher that goes towards the purchase of a new phone on eBay. eBay said that they will offer a higher trade-in value on old devices than cell companies. What would it take for you to give up your cell phone for a month? What is the best cell phone that you have ever owned?