Open.
Play.
What on Earth would pinball people want with a box unopened in the corner?
Pretty expensive lot though, and I would find it hard to justify. But I've done way more than what would be lost on one of those on most cars I've bought new. I suppose well-waxed they'd stay at the higher end value-wise.
Personally only Funhouse out of that lot is at all appealing.
+1
Play them - What possible use would they be sitting in a box, unless someone forgot they existed ?