answer:The link says don’t buy “Worn plates, pots, and other cookware”, illustrated with a cast iron pan. The advice is good about non-stick pans, but cast iron is a GREAT thing to buy used. The old pans are better, because new cast iron pans have a rough surface. In days of yore they polished the interior smooth. Even if it’s rusty you can scour it down to bare metal and it’s like new. Other than that, I agree with the list. I look for glassware, garden pots, wooden furniture and I’m always looking for bicycles (but rarely find good ones).