If it were me, here is what I would do.

If the guy wants to pay by check, have him cut you a check for the item and shipping. Wait till the check clears and you have cash, then pack and ship the item. Zero exposure for you. If he sends it back, it is on his dime. If he doesn't like these terms, tell him to purchase elsewhere. Resolving disputes like this with folks in a different country can be a real hassle;

Dan