I can't recall what I priced that one at (I deleted the old listing), but for the A+B on a good CPS1 board set, I think $300 would be fair. I might go $350 on the Thunder edition due to the output on mine looking washed out, but I'm assuming there's a fairly easy fix for that.
For just SF2:WW? Let me do a price check on that one, get a better idea of what the "going rate" is.
As for the "mod" board, it's this version - apparently called "Thunder Edition":
Good question - whatever you're willing to pay for one, I guess? ;) I think I just saw a PCB for that on ebay that was in the neighborhood of $250, but that seems a bit overpriced to me.
Good luck finding one! I'd be happy to sell you one if I had one, but I just have a regular SFII: World...
I'm so sorry - I think I entered the info for that improperly. All I have is a PCB for that game. I'm going to remove that entry and put in an updated one to make sure I have it right.
I do have that board available for sale, and I might consider selling it in a cabinet, but it's definitely not...
I'm also willing to travel a reasonable distance to pick it up, but I'm very interested in finding a working Cheyenne machine before the end of the 2009, if possible. Please feel free to contact me via this thread or PM me. I will also entertain the idea of having the game shipped from out of...