Ed in Tampa wroteI take tires very seriously. I also tend to drive at the high end of the speed limit.
If a tire is mistreated it will blow eventually.
If the tires aren't new you don't know if they have been mistreated or not.
I have seen too many cars laying on their sides, or up sided down because the tire blew.
Ever notice a NASCAR driver or F1 driver keep his tires on after they have been mistreated by hitting something or a wreck. No NEVER!
For your own safety and the safey of others on the road take good care of your tires, if you hit a curb, giant pot hole or do something stupid go have them checked. If you don't know how the tire was treated since it left the factory don't use it. My life and the life of my family and your life and the life of your family is worth more to me than a couple hundred dollars saved on tires. And I will also add don't save on your brakes either the savings might not be worth it.
I'm a motorhead. I don't just buy any used tire they bring out, I inspect them on the rack and know what I am looking for before we negotiate. You can read a tire and tell if it has been mistreated, not rotated (wear on one edge), overinflated (tread worn in the middle), left sitting (flat spots), old (date code or cracking), problems with sidewalls and radials, etc. Tire shops also don't offer the bad tires for sale because they want repeat business. At least the ones in small towns don't do that. If they don't have anything I like, I don't buy that day.
I see a lot of wrecked cars with blown tires around here too, but its almost always a poorly maintained vehicle (with a poorly maintained driver!) and the tires were bald already. Saw one last night on the interstate coincedently, and had to make a snap move at high speed on a curve. Tires performed beautifully.
As far as brakes go though, I agree. Don't skimp. I always rebuild the entire brake system on every project I get, and always have a spare set of Wagners on hand for my truck. Good brake pads aren't expensive, no reason to cut corners.
But as for used tires, there is nothing wrong with the good ones. Just perception, which keeps prices down for guys like me.