Approx shipping cost?

They will fit in a "Game Box" from USPS Flat Rate but I have heard that they no longer use those boxes. SOmething you may want to check on. There have been a few that have been damaged though in those boxes because of the lack of space for proper packing on the ends. One drop and the intake corner may be broken.
One of our members pointed out in a different thread that USPS is phasing out the board game boxes, so if he has one, that's great

If he has to find one, it becomes a toss up