[codesuela]

I think as long as he doesn't ask you for 50 grand to be paid by Western Union to an African country it's safe to assume that he is not a scammer.

[tonyjwang]

I think scammers, even the ones in Nigeria, use a wide variety of tactics. I think it's prudent to be wary in a situation like this, where the OP is explicitly looking to offer services for money in an unusual situation in what will likely be an unconventional transaction.