Are you going to crate it or do you want someone to crate it and ship it freight?
Or is it 6' wide by 4' tall?
There is Greyhound Bus lines for shipping at a very reasonable rate but they have certain size and weight restrictions and it has to go freight if it does not fit in their restrictions.
I go through Matt Helmholz who is a shipping broker for elite movers if I have to ship freight. He goes and finds the best rate for the particular crate by shopping all freight brokers.
I shipped a crate thru him that was 11' long and 4' tall and weighed 200+ lbs. email@example.com is the way to contact him.
I also shipped a crate thru Greyhound that was 80" long and 4' tall and weighed just under 100lbs.
This is what I have found, at least so far, and I hope it helps!
LOOKING-4:WELDING SIGNS,Charter/Finance/PulOil/Trulite/TruTest-Oils,True's gas CORALINE/RAINBOW, Gardner 70 items of Yakima wa., Wa/Or/Id Chief items