@LinkArcade If you still want to sell it, post up some decent high res pics of the entire board/different angles. List it as a conversion and ask what you want for it., could be a $1, $10,000, hell ask a $1M, it's up to the buyer to determine if they are willing to pay your asking price or they might make you an offer. There would be zero problems/issues if you were to do that from any of the members/staff here.
I will make you an offer of $1,250 for the PCB itself since it seems to be in working order and since I don't know what it used to be and what components were replaced on it, etc...I have no way to tell this unless you can prove what it was, have records of the purchase/arts, etc.. and of course based on the current market value for these game PCBs. Others might offer you way more than that or maybe less. To me, that's what it's worth at this point.
Good luck with whatever you do. But please don't try to sell it off as an original to someone/somewhere else. In the long run, it only makes it worse for everyone in this hobby for multiple reasons.