I was at my local vault yesterday and they had a buy one pair at retail and get another half off. Ended up buying a stephan murray fuel cell and got a live strong fuel cell, no box for $35. It was on the sale shelf. Also picked up some fives squared (non polar) for $38. Pretty good deals. Don't know how long the sale is but the half off isn't bad if ur gonna grab a new pair. The half off didn't apply to some pairs, infinite hero, ducati n some others. Thought id pass along the info.