MacBook Pro 17" 2.16-2 GB-120GB - Core Duo 2.16 Ghz - ATI X1600 256 MB RAM - 2 GB - 120 GB - SuperDrive - Purchase date 2007 - Mac OS X /Leopard 10.5.6 - No more warranty he wants 1500Dollar. What should I check for not to have problem later? should I get serial number and can I check sth more certain with serial no etc....? Please help me guys, I appreciate!!!