I'm not surprised that it didn't sell. Even though Australia is a bit on its own, these machines should be available at somewhat the same price range as in the US or Europe down there too. In Europe I would hesitate to buy a complete (with lens(es) ) 138 at that price. I mean the price is OK, but not a bargain.
While the board isn't that special, it does have a few gadgets in it too, so it's not just a matter of a piece of MDF with a screw mount in the middle.
//Björn