Jady, like yourself, I also have a Skateball. Very first game I purchased and a blast to play. I have never seen one of these for sale since I purchased mine on this very forum 2 years ago almost to the day. This one was restored by Nino, and a beauty.
Another machine I was searching for and finally landed is a Bally Freedom (in this case, the SS version). Again, I have never seen one of these for sale in Australia, and was fortunate to source this from Michael Shalhoub. I played this heaps in my youth back in Canada. I have a feeling that this game was not exported in large quantities to Australia.
1950 LINE UP by Genco... only 10 prototypes made.. all went to the scrap bar 2 that found their way to Mr Kordeks basement.. i have one.
1948 TRIPLE ACTION by Genco... again, 1 of 10 prototypes made before game went into production... these were used to iron out design faults etc, which is why mine has never worked in 60 odd years. Its now 99% working.
Phenomenal Gavin that you have these machines, actually almost unbelieveable. With Steve's recent passing, these would have to be that more special for sure.