It shouldn't be too hard to find. There should be several at the convention. All / most are in AU to UNC condition.
It's only the $100 that has the space ship. I don't think it's a UFO, just a space ship. It opened in the 1960's when a lot of space race stuff was going on.
You can see the space ship on top of their signage & on post cards of the place.
Value, IMO, is under $100. Probably $60 to $80, though I haven't priced it lately.
It is a fun chip to have.