[cctalk] FS: 32KW Omnibus RAM board

I bought one of Vince Slyngstad's PDP-8 Omnibus 32Kword board kits (battery backed-up RAM) a few years ago. I assembled it and it worked as designed. (I had an 8/A with 32K of actual core so I didn't use it other than a test). Having sold my PDP-8/A system and not contemplating owning another, I'd like to sell this board to someone who could use it. But I have no idea what it's worth... make me an offer, or at least recommend a price? thanks Charles