How much is a misprinted 1.00 bill worth?

Nothing because it is not legal and because of the misprint and that it is printed wrong the only way it can be worth something is if you sell it to a collector but that is rare.

CorrectionA misprinted US bill is technically still legal tender, but it would normally be worth much more to a collector depending on the nature of its misprint. And to set things straight, there are many collectors and dealers who specialize in US paper money errors, so it should not be difficult to find a buyer - again, depending of course on the nature of the error.