I need a wordpress plugin for a cellphone buyback website

I'm looking for a wordpress plugin (or stand-alone script with backend admin) that I can use to buyback (or accept donations) for cellphones, laptops, tablets, etc as in the site buybackworld.com or cashitgadget.com
The visitor should be able to:
-Choose Phone/Tablet/Electronics Device
-Choose Provider is Applicable
-Choose condition of the device
-Obtain Instant Price Quote
-Choose payment method (paypal or check)
-Get USPS Shipping Kit
-Ability to track order
Please let me know if you're planning to build a stand-alone script with backend admin or a wordpress plugin. And Please do Not apply unless
-1- You know what's required &
-2- you Can Do the Job and Finish it in a timely manner.