A few weeks ago I was contacted by a guy who wanted help identifying a unique Action 52 NES cartridge. It appears that it may be the earliest known Action 52 prototype. I've put up a ton of photos that he sent me in a blog post: "What's Rarer: A Prototype Action 52 Cart or a Person Who's Met Vince Perri?"
What do you guys think? Is it a prototype? Any idea what it's worth?