I can see the scam almost immediately. Two things give it away. His unavailability to phone (typical) and his English usage. He is writing with an "accent, though not bad compared to some, which tells me he is probably from India or somewhere...
As a promotional products distributor, I get these scam emails at least twice a week. They usually request 2 or 3 hundred power bank chargers or several hundred T-shirts with minimal printing. I just tell them first time purchases are cash...
A lot of times their return address will be from a house that is listed for sale. The checks appear to be legit, but the account number will be different from what it should be. I did once contact the FBI, who told me to contact the Treasury...
LOL, I do the same thing. The last one I received (last week) I quoted them $20,000 to do the real estate photoshoot they wanted. Had them create a client account in my billing software and after stringing them along a day or so, I told them...