A few good points Gav.
One thing about your last comment, the hobby is bigger than just the forums, yes, But I havent seen anyone outside of a forum try n organise a pinball expo in the last 3 plus years.
Is there such a person who loves pinball and has as much passion as a forum member. I think AP and AA shld have a world record recorded by The Guiness Book of Records for being the best n most loyal pinball people on the planet. !
Something else i thought about, I dont think machines shld be for sale at a expo, unless its a NIB Stern. There shouldnt be competition inside a expo unless its a pinball competition i believe. Or the first thing that happens when people see price tags on 2nd hand pinballs is "rip off" ""so and so charges too much, its not shopped properly etc etc". A brochure representing a business etc is enough, no more machine sales at a expo would be my ruling UNLESS it was a for sale only sticker, with price on application after the Expo, by calling XYZ seller. Parts yes, etc etc. NIB yes, 2nd hand, some strict rules. Displays, pinny tournaments etc, part sales, resto services etc, all welcome, all fun stuff.
Everyone shld keep discussing ideas, it certainly all helps.