All of it is incredibly overpriced. First of all, the autographs themselves aren't worth that much, and second, just because they hung at Manny's doesn't make them any more valuable. Still, I'm sure they will sell.
I left a full size poster of Ted Nugent, with a personalized autograph I got from him when I was 16 (including signing his guitar, Byrd I), at my condo when I sold it.