Ever try and date some of your older stuff based on the manufacturer logos, model #'s, foundry codes, etc. ?
I looked up a couple of ours (yeah, I was bored
) and was surprised at the age of some of our skillets ... one is a tiny 6" Griswold that was made between 1909-1929. Another is a Wagner # 11 dated between 1924-1935. There's a Griswold # 8 from 1930-1939. I got all but one of them over 25 years ago from a guy I worked with who did flea markets on the weekends. All were in rough shape when I got them but all cleaned up and seasoned well, no cracks, pits or defects of any kind. All of them still get regular use. I think I paid him something like $10 for 4 of them ... maybe I should go on Antiques Roadshow and hit the lottery
If any of your pieces has a raised ring around the circumference of the bottom, that's generally an older piece from the wood burning stove days and sometimes adds value. Two of ours have that.