Why not? Not everybody that likes the Neo needs to be an active member of this site and spend some hours each week discussing the current dramas.
I don't find his story hard to believe: he is a regular neo geo collector / gamer, and he decides to buy a game he likes a lot in AES format: Metal Slug. I agree this would be his first purchase of this caliber, but well, from all the overpriced AES games, Metal Slug is probably the only one that somehow deserves the hype, and you can always sell it anyway for the same price. However, the guy he buys it from is a scammer and sells him a conversion, and tells him the bullshit lie he will refund him if he's not satisified (this happens all the time in these scams, like kyokugenstar did).
Pixa is suspicious about this not being legit, so he wants to hear the opinion of the neo experts here. He's taking as many pics as he can or is requested, there's no way he is trying to make this look legit so he can sell it, he only wants the TRUTH, and if we reach the conclusion that this is a conversion, he'll contact the seller.
So did you actually pick up the game in person? Is the seller's store in the same city as you? Usually the scammers don't want this to happen, because it's beter for you, so you can go there and kick his ass easily.