I'm a cast iron cookware junkie. Yard sales are perfect for finding the vintage stuff. Most pieces are there because their present owner doesn't know how to care for or cook in them. Even those severely neglected pieces can be brought back in to service with a bit of TLC.
Folks that know me and my penchant for cast cookware have even outright given me the stuff. Always nice.
My inventory is too extensive to list here. I have everything from four inch skillets on up to an old soap kettle that I break out for large gatherings a couple of times a year. Beef stew for 300 or so? No problem!
The original, renewable, non-stick cookware is still the best. Solid, thick bottoms for more even heat distribution and the durability to last several lifetimes. Consistent performance over a wood fire, stovetop or in the oven. Can't ask for more than that.