The majority of tournaments are using PS3 only because of the usb support of many different types of sticks/pads.There seriously isn't much of a difference between the games on either platform.
Item is brand new and never opened in original box.
Starting bid is $100.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120410491610&_trkparms=tab%3DSelling
My first one arrived in mint condition.Just recieved a second one and No freaking game/dvd! It didn't even have the outside box with the Master Chief art work inside.