Which type of tow dolly to buy? Kind with brakes or not. I am looking at a used tow dolly without brakes?

no clue. what are you towing? what are you towing it with? you can rent one from uhaul(hauls up to 3500# or you can buy a tow dolly(I think around 1300-1500. If you plan to tow something like a suburban you need a big horse and they make a dolly, but it's expensive. You can buy,again with the buy, a "brake buddy" that will allow you to utilize the towed vehicles brakes when you hit the brakes. BUT, back to the first question. what're you towin and whater you towin it with?"