Mark David Chapman's Autographed John Lennon Album Up for Auction

Mark David Chapman's autographed copy of John Lennon's 'Double Fantasy' is up for sale and is expected to fetch a staggering $850,000. The album, which Lennon signed for his killer outside of New York's Dakota building five hours before he was shot dead on Dec. 8, 1980, has Chapman's forensically enhanced fingerprints on the sleeve.

"The album is the most extraordinary artifact in rock 'n' roll history," autograph dealer Gary Zinet told the New York Post. "There are evidence markings from the NYPD."

But for some heartbroken Beatles fans, the idea of someone profiting from Lennon's death goes beyond being just disturbing. And it explains why Zimet -- who first sold the disc in 1999 -- is again handling the confidential sale. "The current owner doesn't want to be named because he received death threats," Zimet said.

After Chapman murdered Lennon, the autographed album was found at the entrance to the Dakota, where Lennon lived, by a maintenance man, who handed it over as evidence.