whoa.. did I read that right? Someone's giving you $350 for your stock wheels? That doesn't sound half bad. If I were you, I'd try to sell the tires too. I'm sure everyone will agree with me here: the stock WRX tires are really not worth keeping - no matter how much tread you have left. If you're getting new wheels, you should seriously consider getting better tires too. I'd recommend slightly wider and lighter wheels, but the style is really up to you. Personally, I like Rota Torques even though lots of people have them.