Quoted from etien:

I would disagree with folks thinking that pinball will go up forever. There is a classical economic cycle for collector items: aka peeps buy at 55 what they dreamed of when they were teenagers. Why 55? this is when you have disposable income ( house paid, children education paid and so on ) this is why old comics, retro gaming fashion and so on. Who cares about pinballs from the 50's ? movies from the 40's ? very few of us as the circle is over. So yes they will go down in oblivion once the people who experienced them onsite as youngsters will be gone/too old. This is also why marvel and star wars are back into fashion. Let say in 25 years from now pinball will be gone as noone will ba able/care to maintain them. We should be close from the top.