I think important factors here are fashion and supply constraints.
Fashion
Old timers have had many years of owning and playing what I consider to be the best era of pinball machines made in the late 70s to mid 90s.
Opposing this, there is a growing market for 80s and 90s electronic nostalgia. I was sad enough to watch a YouTube video about a 1980s technics cd player that was sold to punters as well as to radio stations. These things are going for high hundreds now.
My youtube feed is now full of videos about 1980 and 1990s hifi stuff.
If you are bored with the older stuff and you want something new, something that surprises you, then you are attempting to buy the latest titles when there is a shortage of supply.
10 buyers of turtles, 5 turtles means prices Will be firm. And paying an extra 10 per cent to get one is probably neither hear nor there for folk.
Nearly new car prices have been outstripping new for some time in America. Older used cars are more valuable now than they were a year ago. Classic cars have gone turbo.
It is thus entirely logical that you may pay a premium for a used, recent pinball title.
I think
@CHRIS B PINBALLS is spot on. When the new games start arriving and the eager buyers get filled, then I think there will be a different dynamic.
My only ever experience of NIB was a JJP Dialed in which was very poorly set up. I spent as much time messing about with it as I would do on a decent working mid 90s title so there is even an argument to get a nearly new game as the previous owner will have been through the pain of updates, new software, workarounds, fettling the thing....