The box my laptop came in wasn't sealed. I just picked up a $600 camera yesterday and the box didn't come sealed. Yet the $20 keyboards we ordered for work came sealed with 2 QC stickers. WTF?
My laptop came sealed in box.
Some scam artists use shrink-wrap machines, so sealed doesn't always mean new.
The netbooks I got from Target a few months ago had security seals over their cardboard tabs.