Well, I just got home from picking up a used Demco Kar Kaddy Tow Dolly with Surge Brakes. The couple that I got it from got it to move a car from Florida to Georgia so it does not have many miles on it and it was always stored in their garage.
The Owner gave me great instructions on the operation and described his way of doing it. He also gave me the original packet with instructions that came with it.
I paid just under $2000.00 which considering what I've seen them for new, I feel I got a fair price.
Now, we have to plan our second trip, first towing. :-)