Interested in starting a tire repair shop that specialize in low cost used tires.
check dealerships, an tire stores [good year, tire kingdom, discount tire, etc.] my dad sold used tires years ago, an used to just collect them from dealerships in the area.
We don't purchase used tires. They are taken off vehicles that come in for tire replacement. Your looking at a very tough business plan if all you are going to do is throw on low cost (and low margin) used tires combined with a big liability problem.
The used tire shop next to my shop knows people at regular tire shops and at dealerships. Also people show up with tires all the time. Its more of a network thing than there being a dealer of used tires. I know he buys them from a few major chains from the employees who sort out the good ones and take them home with them. He usually pays like $8-$15 a tire depending on the size, condition. Then he sells them mounted and balanced for $50-$75 a tire.