This may be bad coming from a Canadian, but your price is very very low my friend. I purchased my Premium 360 for 650 bucks (That INCLUDES sales tax)
1 Wireless controller - $50.00 (And One that comes with the system)
Call of Duty 3 - $50.00
Premium Xbox 360 - $459.99
So it was about 550 off the shelf, and the tax was about 100 bucks. Your price is very low. But I know that in America your dollar is worth more, so stuff is less expensive....
Anyways, I would bump up the price. Especially with the 50 dollar subscription to LIVE and all those games.
I'd buy Rainbow Six from you if you are interested. I'd only buy it for cheap though, since it would cost a fortune to get it over the border. PM me if you are willing to sell just that one game.
Also, is your interested in a PC that is stronger than a 360, check out my topic on in this section, I am selling mine. :)
~Cy