he was kidding.. hes offering the whole game for $1500 hence the "rest of the game and a working pcb and monitor free" comment

Have you tried ordering one through a Namco distributor? I suppose it might costs as much as the whole game is worth...now at least.
Namco wanted $2300 for an empty Class of '81 cabinet with graphics applied only as a spare part to replace a vandalized/mutilated cabinet. Needless to say, that game was stripped.