This is sort of disgusting

Album signed for Lennon killer on sale
An infamous piece of Beatles’ memorabilia is up for sale on the Internet, Reuters reports.
The copy of John Lennon and Yoko Ono’s “Double Fantasy” album, signed by the musician for Mark David Chapman hours before Chapman killed Lennon, is up for sale on
The album was found hidden outside the entrance of Lennon’s New York home, the Dakota apartment building, shortly after he was shot Dec. 8, 1980. It was used as evidence against Chapman.
The asking price for the “most important piece of historic rock memorabilia ever,” according to the site, is $682,213 Cdn. The album includes Chapman’s forensically enhanced fingerprints, visible on the cover and dust jacket.