You shoul precise it is the MARIO Version, because Same Game was released in stores,only Mario & Far East of Eden versions are rare and unreleased in stores. It is worth like 500$ at most.
Not even that I don't think, nowhere near tbh. realwws - does it come with the letter? If so I'd say $350 odd max, if not $200 tops tbh. I'd certainly pay no more as its quite easy to find I think. ($1k-2k lol..we're not noobs) Which reminds me..I have a water stained sonic for the MD..is that rare at all..surely only a few copies exist is such a gross condition..yours for $5000 lol!
The one in your picture is called UNDAKE 30 Same Game Daisakusen Mario Version. It was a contest cassette for shops but it was released on the Broadcast Satellaview-X as well. The other version is Same Game Chara Data Shuu and has different characters from Tengai Makyou. You can read lots here; http://translate.google.com/translate?u=http%3A%2F%2Fwww004.upp.so-net.ne.jp%2Ftadabomland%2FsoftSAMEGAME.htm&langpair=ja%7Cen&hl=en&ie=UTF-8 I never saw a letter before, just a contest manual.
Im not going to delete this thread but realwws take a look at the marketplace rules about sales... You are not allowed to be asking for offers or offering anything for sale here!