Mac Forums

I'm new to Macs first. I'm trying to purchase a used Macbook and I'm confused as to whats over priced and waits fair as it seems most used ones aren't that much off of new ones. So here are the specs I've one I'm considering

13" Macbook Pro
2.26 core 2 duo
4 GB of RAM
500GB Hard drive
4 months old and still under warranty
What's included: wall charger, mac OS X install discs, black snap on case, apple remote and original packaging.

He was asking $1,000 but I felt that was to much so I offered $700 and he agreed. Is this offer still to much? I just want to be smart and know what I'm doing. Thanks in advance everyone.