It's hard to say. There are legitimate dealing overseas. A friend of mine had this same sort of e-mail for his boat that was for sale.
I told him to just ask the bank manager or loan manager at his bank. They will know what to do or at least point you in the right direction.
It turns out my buddy's was a fraud. As soon as the bank manager got involved, they never heard from the guy again.
So ask the guy that gets paid to know more then we do.
Good luck, I hope it is real and you do sell it.
Over & Out,