The figures appear to be attached with a nylon latch attachment screwed into the bottom of the display but not into the actual figure themselves. I have not removed them from the display and the display is not sealed on all sides.
They do appear to be in excellent condition and have probably been in the display case from the beginning. It was found with another ToysRUs display that had Mega Bloks in it as well so I would assume it came from ToysRUs as well. The display case is plexiglass.
Would be a great piece for a collector of these figures as you most likely would have a one of a kind piece. This item is in the category "Toys & Hobbies\Building Toys\Building Toys & Blocks\Building Toy Complete Sets & Packs". The seller is "happyise55" and is located in this country: US. This item can be shipped to United States.