Thought I'd share the deal, $30 for 1500lb dollies. If you do a google search you can probably find a free shipping code too. I'm on my second set, these are decent, just don't roll your sled down your rough driveway, eventually they'll fold up and break off the wheels. If you are just looking for something to move your sled around your smooth garage surface, these will work great. I'm in no way affiliated with Northern Tool BTW.
http://www.northerntool.com/webapp/...duct_6970_200127324_200127324&issearch=124696
http://www.northerntool.com/webapp/...duct_6970_200127324_200127324&issearch=124696