I have used Uship.com a few times with very good results. They are a bid type forum and you choose a price and shipper. I have had a car and some tractor sheet metal shipped at a fraction of the price of the big companies.
Here's a second recommendation for Uship --- I've shipped a tractor, tires and a couple of other smaller items via Uship with great results at great prices.
Check with a trucking freight company. Someone like R&L Carriers or Yellow Trucking. Google LTL " less then truck load" carrier and see if they might be able to move it for less. Something of that size and weight would have to be truck shipped and usually a dolly and a lift gate are required to load it.