I've got an enormous retro gaming collection as well, but much like my comic collection, I've been acquiring them for literal decades. I was the kid who never traded in his old games and systems to acquire the new ones. But I have my games so that I can actually play them (or lend them to others to play), and I rotate which systems I have hooked up when my desire to play one arises. The thought of having them graded and never being able to use them as more than shelf decor is so odd. I opened up and played with all my Star Wars figures too. But I'm weird like that. :D