Well, I can tell you that for normal ground shipping I have used Uship.com a couple of times. Basically its Ebay but for shipping. You have feedback and it costs nothing. you can set a target price and a " ship it now" price for what you are willing to pay and or you can have shippers bid on your item " ie the privileged to ship it for you" And of course haggling is the name of the game.
sign up and test it out, its free so.........