I recently purchased a dolly from www.paintedsheepdolly.com.

I was just testing it around the house, and it worked extremely well. Smooth action, totally silent. They run around $250.

It looks like something handy people could make themselves, but I'm an unhandy person. If I pick up a power saw, the only thing that's going to come off cleanly are my fingers.

I'm mostly filming in tight corners, interiors, etc, so this should ideally for me.

I throw it out there for folks looking for inexpensive dollies.