Factory reset a mac

[sappleton]

selling my mac so wanna reset everything, got the os x discs, what does one do?

 

[Natobasso]

wipe and re install os x from the os install discs and 'zero out' all the data on it (click the checkbox when your computer is booted with the cd; but be patient, takes a couple of hours to complete):

http://docs.info.apple.com/article.html?artnum=107437