I am in the car business, and have recently started using a site called U Ship.
uship.com is the website.
Basically, you post the load information and it is put on the "board."
Transporters will contact you directly with bids.
The good thing is that they have feeback from customers, so you can use that feedback to be sure you have someone responsible and professional for your transport.
Kinda like eBay cause you have feedback and bidding.
The great thing about the feedback system is that the transporter will be on their toes to get your vehicle to you on time and in a professional manner (cause they know you will be posting feedback regarding their service).
Been working good for me so far....
GPA