I've got a few things listed on eBay at the moment, one of which is a pair of some kinda industrial CCD cameras that were originally part of a bowling alley mechanism.
Not sure what they were for, exactly, presumably pin placement, or detecting when the ball has passed, or whatever. I'd considered making webcams or cheap security cameras out of them, but I already have too many projects on my lists. If you can use 'em, have at it.
More tinkery and PB stuff will be listed over the next few days. Keep watching.