What to look for in old cast iron
I tried new cast iron once and didn't get it seasoned right and gave it away. I'm thinking of trying again but still don't like the idea of pre-seasoned. I was thinking of picking up something at an antique or flea market. I also tend to worry about pre-used pans, who knows, maybe someone used it to cook meth at some point........but anyway!
If I were to see a cast iron skillet or dutch oven in such a store, what do I look for? Certain brands? Thickness?