Here is my situation: A friend of mine is upgrading his GPU soon, and we currently both have the same GTS 450. I am also in need of an upgrade, and he says he'll sell him his old GTS 450 so I could use the two in SLI. He's offering it to me for $30, is that the best option? I don't have a ton of money to spend on a new graphics card, so getting SLI for $30 seems like an amazing deal. Would buying his card and using the two in SLI be a good idea?