In May of 2008, I was given quotes to ship a 42' X 13' boat from Ft. Pierce, Fl to Detroit, Mi. Quotes ran from $6500 to $8500. That was the busy season for trucking. I would suspect it could be a bit lower off season. This does not include prep, haulout, de-stepping, relaunch or re-stepping. Those items can add up real fast, even if you do much of the work yourself.
Ballpark figure will be $10,000 all in.