Mint hang tab copy I would say at least $150 possibly up to $200. True first print copy with no TM on the front and no top left code or NES GP Game Pak on the back would probably be between $200-300. You wouldn't think it because it's Mario but it popular and mint hang tab is stupid hard to find no matter what game it is.
Seeing as how this is one of, if not THE, most important game in video game history I would think that it should command a hefty fee. Not sure if you were planning to sell it or not but I would advise hanging on to it as long as possible since its in minty shape. The more time passes the fewer of these there will be in this condition. Price can only go up/
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http://imgur.com/SX7DpCV
http://imgur.com/ORZqPoY
Oh thats not what this is?well how about that.
dude thats a sweet looking copy so yeah... $51.00 oh still not the place shit...