Don't know really. But here are a few suggestions: Check the news groups. RGVAC, RGVAM and maybe AGM. Check some websites. quarterarcade.com, arcadeshop.com and even ebay.
Questions:
Does it work?
Do you have the Marquee, sideart, bezel, cp and/or cp overlay? A complete "kit" may get you more money then just the PCB and you may find the other pieces cheap enough to warrant collecting the kit.
Most importantly, are you trying to buy it or sell it?