Sram XO Rear Derailleur

I have a Sram XO rear derailleur up for sale. It is the "older" model with the aluminum cage and not the new Blackbox upgraded carbon cage. It has a medium sized cage length. The derailleur is in excellent functioning order and the spring is tight so you will have an endless amount of precise shifts. I am looking for $100 or best offer on the derailleur. I have a lot of other stuff for sale so check out my other ads. Send me an email if you are interested or if you want some more picture. I prefer Calgary or Ottawa locals but I will consider shipping.