Some vender's do send the goods out, a recent example is Comet sending out TV's way less than the ticket price, as a good will gesture.
As for the error? IMO no error was made, just a newish type of viral marketing campaign. It even made the TV news, the site traffic, the inbound links....
A good idea which I think will be seen plenty more times in the next few months, probably to the point of saturation.
PS Anyone for a 1p apple mac?
Big waves, small boat ;)