Hey guys, my dad was doing some painting for an older lady a couple weeks ago. He was cleaning out one of her closets and she had and "unopened" NES Action Set. She said she wanted to get rid of it and just gave it to my dad. I am unsure if it is actually unopened or not and I don't want to open it and potentially lower the value of it. As far as I can tell there is no tape on the seams and it doesn't have any rips from where tape would be. The is not in very good condition and I am unsure whether or not it has actually been opened or not. On ebay there is one listed for over $1000 but it is in great condition and been certified by a company. Is there any way to know for sure if it has been opened and what can I expect to get for it because it is in fair condition?