The system requirements of World of Warcraft grew massively in recent years. My father's desktop which he uses to play WoW has 8600 GT in it. He can play on medium settings of textures, spells, but has to go low for liquids, view distance and has to turn shadows off completely. 8600 GT is similar to 9600m GT.
For 100 euros? GET IT NOW! You won't get anything better even for 200 euros. Seriously, it's very good for the price. Even though you won't be able to enjoy high graphic settings, but at least games will work.