Where is the best place to buy a used Trailer Dolly?

IPegasus wrote:
Put a hitch on the front of your truck. It works really slick. I had a hitch on a previous truck. Now I use a tractor with a hitch on the front.

Yes that helps in many cases but doubt it would help me with this 90 degree turn i still need to make in this tight space?
I need something much smaller that a bull full sized truck.

I already have a front hitch in front of two of my 4X4's.