I've got a 2007/2008 2.4ghz intel core 2 duo macbook pro 2GB ram upgraded 256MB NVIDIA graphics card. I'm trying to determine the value of this system...i've found several sites that will give a number, but none that can factor in the upgraded graphics card on this unit. It has a BRAND NEW logicboard, replaced last month under my apple care which has expired this week. Looking for advice on what I may be able to get for this, i'm planning on using the money to upgrade to a new iMac, as i'm tired of having a laptop attached to my hip! any advice is welcome.