Mate for $100 for any pin is a bargain but for a classic Aussie machine you're bloody laughing!!!
Sorry I don't have an answer to your question but I just want to say welcome aboard anyway :)
Ev
I'll second what Evro said above and would love to hear your story how and when you picked up your pin and such a fantastic price!
I put an Ad in my local paper. Next day this guy rings up and says he has a machine I can pick up for $100.00. I was so excited I didnt even ask what it was. I go around there immediatley with a trailer and there it was. His story was that it was hit and miss as to whether the thing worked or not from one day to the next so he wanted to get rid of it. Worked fine for me for a month or so, then this.