Charlie,
I'm sure you performed a full disk write 1's and 0's for ten cycles AND did a block crypto overwrite on the WHOLE drive right...
Turning the Windows OS to mush then you performed a complete reinstall of windows... Right?
Kind of be embarrassing if some of your personal data and information was forensic scanned at some future date after a "working girl" ran afoul of law enforcement? Right?
Bet you think deletion is bye bye like the tooth fairy as well.
Please read this (
http://en.wikipedia.org/wiki/Data_remanence ) before selling a laptop on a site like this... geez.