This is the every elusive Konami X-Men 6 Player (Not 4) PCB.
These boards only work in the 6 player cabinets with dual monitors. Just like their 4 player counterparts, they use the sound chip which as capacitors on it, which leaks and destroys the chip and often times the board. The original sound chip had been harmed enough on this board that we elected to go with one of Ian Kellog's new chips, which still takes quite a bit of work to have up and going 100%. This board is now repaired and working as it should be. Rare is a understatement on finding these. Our friends at Coinop Amusements just sold a slightly tested one, where the sound chip had still not been updated, for $550.
Board is sold as is, but it is working. I however cannot control what you do with it after you get it. Glad to help if I can.