That scam is nearly as old as the Internet - maybe older. Usually includes a Cashiers Check. That is counterfiet, but will not show as such until a couple of months have passed.

Here's a suggestion: have the 'buyer' write a check to his trucker for the freight + the cost of your truck. Have the trucker cash the chack and bring you ten pictures of Ben Franklin printed by the US Treasury. Accept nothing less. US Grant would be OK, except those things tend to bulk up on a guy if you get many of them