Best Diagnostic Software for New Purchase

Hi,

Just wondering if somebody could recommend me some diagnostic software to try out while demoing a potential macbook purchase. Obviously I'll be checking all the ports are working and capable of powering an external drive and that the disk drive is fully functional. However, I'd like some reassurance that I won't be buying a complete turkey.

Cheers,

Jon

Make sure it has the install DVD's with it.
Then do This