I recently got a cardboard boxed game from an ebay seller and specifically asked them not to sent it in a bubble mailer. When I got the package though, it was, you guessed it, bubble mailer that looked smashed.
Got home and opened the mailer though and I got a wonderful surprise. The dude had actually flattened the box properly, then put heavy cardboard around it, and packed other stuff around it with thick bubble wrap. Took it out and it looked great when I un-flattened the box and put it together again.