Hi there,
I just measured and calculated what the shipping would be if I mailed it with the cab turned at a 90 degree angle (the cab is attached to the trailer...they do not come apart) thinking that it might be cheaper if the longest side was shorter. It would be 18 x 14 x 10 and it ended up being the exact same price, so it looks like $45.70 is the cheapest that it can be sent by USPS.