Autograph vulture

A person who bothers and hounds celebrities for autographs just to sell online. Often times an autograph vulture will camp out near a venue where the celebrity is working or lives with several items to be signed. This person is often times not a fan of the celebrity and has little respect for the fans in the same vicinity.

Fan: I wanted to meet my favorite singer but these autograph vultures pushed ahead and asked for 6 albums to be signed and he didn't have time for me.