cheap way to ship bucket seats
If you have a Greyhound bus terminal near you, you might try Greyhound Package Express.
When shipping bucket seats, oftentimes it's easier to take the hinge bolts out and ship the top and bottom apart, but in the same box. Makes for an easier time getting them boxed up and the box won't be quite so big. Also, if there's seat tracks involved, detach them from the bottom of the seat and package them seperately to prevent damage to the tracks.