I had a pair of seats for a panel shipped from SW Texas to Raleigh NC vis DHL in one large package for about $56! Great communication with their agents there and here. That included going out in the country about 30 miles to pick them up and delivering them to my door. The trip took 4 days. Another time, I shipped a 3 speed tranny to central NY via bus. I had to make 3 trips to the bus station before they would accept it for shipping and the shipping took 4 days from Raleigh. It cost about $100. Weight was about the same for both packages, but the seats were much bigger. Go figure.
The owner of a salvage yard who ships a lot of stuff tipped me to DHL.