your theory is worst than mine then. But i knw a guy who own a N4 but has more than 5 bumpers in hand and i heard he is selling triple the original price but given the fact that the bumper only protect N4 from the sides and not the front or the back, not a fan
Seeing that Canada store has bumper in stock I quickly went to purchase one, but then changed my mind once I found out that Google is charging $11 for shipping of $20 bumper. Crazy. It seems that shipping charges are the same regardless of whether you bought a tablet or phone (where $10 charge for $300 to $500 device is not too bad) or just the bumper. I already have Nexus 4 (Dec 3rd Canada order), so couldn't justify getting another one