If you can't run it on very high (wich i doubt), you can always try cudaats mod. It enables dx 10 / very high effects without the big perfomance impact.. i finished crysis at 800x600 in very high to keep a good frame rate lol.. now im replaying it at 1280 =).
What about this.. i paid 1.800$ for a pc that is worth 700$. The same apply to games. I have to pay 140$ for a 50$ game. In my country is almost forbidden to buy things at the right price.. in September an ati 4850 was 420$.. now it is 700$.. and in newegg they are 130$.. with an economy so fckd up i couldn't even think in gaming without piracy..