I got the Japanese one for like 20 bucks new like 15 years ago or so, maybe even a little longer, but even then the English version was hard to get. I can't see that someone would bother to make a reproduction of this particular game, I can see something like Earthbound, but not this. I had the same thoughts when I bought an Ys IV and Lords of Thunder brand new off of ebay in the last couple of years - and if they are fakes, they're damn good ones since I can't tell the difference after 20 years of ownership and importing PCE games. I think you got the real deal, congrats!