You need to add an "all of the above" choice

here's when I asked this question 11-years ago
https://pinside.com/pinball/forum/topic/whats-my-a-list-pinball-going-to-be-worth-in-10-years#post-11163

Interesting comments in that!

I like the comment about Twilight Zone only going up 500-1000 over the next 10 years. What was a 2010 price, $5000?

I wanted to dump all of this thread with all of the "it's a hobby etc..." (LOL I wouldn't do that). But reading the 11 year old thread makes me want to see how this one plays out in 10 years.

My take: ems will still be sub 1k except for certain titles. In general prices will jump 20-40% for most decent titles, 40-80% for popular titles that aren't remade and 150% for popular rare titles.

I have no real knowledge to back this up. I'm just WAGing it to see how I do in 10 years

The peak is coming, then it's a slow decline. I can't see much of the next generation giving two-hoots about expensive pinball machines, especially as virtual pinball is moving into the Unreal 4 engine territory with hyper realistic graphics and physics, full connectivity to millions of other players around the globe, VR compatibility for fully immersive gameplay experiences.....all for about $5 a game. A 10 grand toy!! Are you out of your freaking mind!

It's easy for the old-timers to say....you can't beat playing a real physical pinball machine....but that argument will soon be history.

I just up voted an 11 year old post.

If that's your goal, you are going about it the wrong way
Buy what you like, play and enjoy.
If you sell down the line after 10 years of enjoyment, the machine owes you nothing

Popular games that are out of production, hard to license, and would be difficult to have re-run (legally) with original licensed assets for... reasons. At or near the top of the list I would say:

Indiana Jones
Lord of The Rings
Addams Family

A few limited run but highly desirable games will keep their value as well

Rick and Morty
Tron LE
Star Trek LE

Finally, just to troll earth:
Thunderbirds.

I'd prefer to make more than one vote. I think the late SS (SYS 11), dmd, modern dmd will be strong on value. LCD should be, but time will tell. Theme may also play into this as people's tastes for nostalgia evolve as well. My layout is from 1985 to 2021, my 5 yr old likes them all, so there is hope for future pin heads out there.. This week I started explaining some repairs to him, not sure he got it all, but he did pay attention.