I weigh 195lbs. I was so shocked the i called a friend who works at rossignol and queried him about all this. He agreed that 'most' boots shouldn't be used after 6 years, which shocked the hell out of me because of course no one mentions this at the point of sale. I even returned them to Burton hoping that they would offer a credit or something. Their response was - thank god these are off the mountain, they're completely unsafe. ( and no, of course we won't give you a credit or anything)
As it safe to assume that a buyer of these boots would be going fairly fast, I wouldn't risk it. Happy to send photos if you like.
chris