I don't have any sealed. I've purchased original "open box" editions on Ebay years ago and purchased them over the years when reissued.
Incidentally, I was never one of those guys that gets a little batty about whether something is sealed or not. I was only curious.
(Not that there's anything wrong with getting a little batty about your passions!)
I do have some sealed model kits, just not from the Prehistoric Scenes. Luckily I was able to purchase both sealed and open box kits otherwise un-built. Like the Aurora Black Bear, White Tail Deer and American Buffalo. One day I will build the open box kits and keep the sealed ones in mint condition.