create an ebay/website listing using this information. add info as to why the rear derailleur is so good:
 
Thank you for visiting Traveling Ground! Portions of the proceeds go to buying bikes that we refurbish and donate to Bicycles for Humanity in Colorado!
 
Up for sale is a Shimano Ultegra 6700 RD-6700 Rear Derailleur. The derailleur is in good condition, with some signs of use that are pictured. Both pulleys spin smoothly, and the derailleur works as it should. It has been professionally inspected, cleaned, and is ready to go!
 
Specs:
Short Cage 
10 Speed