There was a sale of a “fantasy” type backglass that he did several years ago that was more complex than these that went for about $500. Other art that he’s done which was printed on glass has gone for less than that, there was a round piece of art on mirrored glass which went for around $200 on EBay a while back. Since these are not tied to a game, and not pinball related, I’m guessing that you’re looking at probably in the $200-300 range, but it’s tough to find stuff, so who knows. I’d be interested in hearing about any other pieces you might have though, pm me if you’ve got anything else you’ll be interested in moving....