Any standard IEC power cord (Radio Shack near you?) will work......

Disturbing that a certified Roland CK dealer would try to sell a floor model as new... but personally, I would test the G70 thoroughly, and take the $200 - it won't affect your warranty, and you can use the money to get a 512MB card, and an FC-7 foot controller (they are almost mandatory, as far as I am concerned!).

BTW, make sure you have the new OS3 installed - it makes a HUGE difference to the sound...