If you're into collecting vintage cookware, that's cool, as long as you're knowledgeable about prices and condition and can pick out the real thing on a table full of faux-vintage, mass-produced "shabby chic." If, however, you're looking for pots and pans that you actually intend to cook in, never buy anything with a scratched or chipped lining.
One exception, according to The Spruce, may be copper-lined cookware, since it may be possible to have this re-lined, but you should check into the expense of this first and determine whether you really want to spend that kind of money refurbishing your flea market find. If you come across an old cast iron skillet at a decent price, though, go ahead and grab it. Even a dirty, rusty skillet can, with a little effort, be cleaned and seasoned and put to good use.
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