Okay, a bit of shameless promotion here for the organization I work for, the Marijuana Policy Project. At our May 14 fundraiser at the Playboy Mansion in L.A. we're going to be auctioning a bunch of items, including a John Lennon lithograph. Here is the official description:
We are auctioning a John Lennon lithograph entitled "Oh! My Love." The artwork is a limited edition relief print, printed on etching press from a copper plate. It is part of the series "This is My Story Both Humble and True". Printed was completed by hand and is hand-signed by Yoko Ono Lennon. The entire collection has been approved and endorsed by The Estate of John Lennon.
You can see an image of the work here:
And info about MPP's Playboy Mansion fundraiser (be forewarned, it's VERY pricey -- it's a fundraiser aimed at the Hollywood crowd) is at http://www.mpp.org/playboy