I am currently looking at buying used Macbook Pro. I have offer on 15" 2009 Macbook Pro that has 2 GPUs for around $840. The MBP is fine, sellers says everything works OK, the only thing that doesn't work is automatic switching between GPUs. GPUs can be switched via an utility but it doesn't happen automatically as it should. I am very interested in it (other than that it has some dings on the lid but nothing serious) but how much should I be worried? What can this mean, failing GPU unit? Anyone ever had this problem? Personally I wouldn't mind about it as I would probably switch it to the better GPU anyway, I do not need long battery life. What do you think? Is it good for the money offered?