Guaranteed

This CompUSA computer store in Dadeland Village came back from the brink. It went bankrupt and was revived by Tiger Direct. Slowly, it came back to life and the store now has a good selection of computer products. Not sure what they mean by "Guaranteed Lowest Price" and how that works. Today is Super Bowl day in the US so the streets are quite empty. Most of us are preoccupied with the biggest football game of the year about to happen at the Sun Life stadium. I am very confused with the name of this same stadium that has changed its name several times recently.