Hi! I'm in the US and I can tell you that here it's very hard to find Xbox 360 and PS3s from legitimate suppliers at a price where you can make a profit.
I've worked with liquidation.com (pretty good supplier here with all kinds of merchandise) and I've noticed that the unit cost of Xbox's and PS3's is pretty close to what you'll end up selling it for. For that matter, any hot electronic item. In my opinion it's high risk, low reward.
My outtake on the video game consoles is this.... so you can get some game consoles for say $185 per unit and sell them for $200 per unit, why not buy high end clothing (or something of lower risk) for $10-15 per unit and sell it for $20-40 per unit. You're making the same amount of money, if not more, and you're not sticking your neck out on the line.
Video game consoles are a VERY TOUGH market.