You would think a ruler would be sufficient for this.

Definitely agree with Brust. My dad recommended him back in highschool and I've read most of the books 2-3 times. Great series! Another one of his books worth mentioning is Brokedown Palace. I could not put that one down to save my life.

I usually snag any family member's laptops there but bypass any of the crap they try to offer. Then once I'm home I do a clean wipe, toss antivirus/teamviewer/chrome on it, and hand it over. I've bought about three laptops so far and haven't seen a sticker yet though.