Several years ago, Ibougt a stack of cast iron skillets at an auction. A stack of three. When I noticed them on the block, I didn't have time to inspect them, and won then on a fairly low bid. I use cast iron for cooking every day. It's my go-to pan on the stove top.
I got those skillets home and discovered that two of them were quite nice, the other was a bit rough. It was rusty and after giving it a thorough cleaning, while drying it on the stove top, found that it is warped. It will not sit flat on the stove top. Not a good skillet, being heavily pitted and warped is a death-knell for cast iron. But, I seasoned it and put it in the stack.
I believe that it is an unmarked Wagner that was once used as a hound's feeding dish. Several years after buying it, I find it is the skillet I grab when I an going to do something sketchy, This morning I founds some leftover boudin that I wanted to heat for breakfast, so I put that boudin in the skillet and ran it into a hot oven. I'm not worried about damaging it, it is already pitted and warped. It 's good for things that I might not want to put in one of my better skillets.
I have good, high-dollar cast iron, and I have this one. This one gets used a lot more than you might think.