Most people IME these days have already put those things largely up on FB marketplace, ebay, their local neighborhood site most especially Nextdoor, etc. Everyday there are posts about people putting things up for sale or in some cases free between Nextdoor and eNeighbors (that's what my specific neighborhood uses).
we don't see this much with furniture and larger items on FB marketplace b/c people don't want strangers coming to their homes for pick-ups (regular warnings from the local p.d. to meet up in public venues or their parking lot) and to do that they have to transport it which is not worth it with the number of flake-outs on meet ups people report on the marketplace (people either hang on to the stuff or if they have a means to transport they take it to a charity shop).
nextdoor hasn't caught on here-people are very concerned with their privacy (I personaly question how it's set up in the first place-i've gotten multiple emails saying I was invited to join up but they were from neighborhoods in states I've never lived in or been associated with in my life).
I love cast iron! glad you got a good deal on amazon but if you ever want more wander around your local goodwill or salvation army b/c the amount people donate is mind boggling (and they sell it cheap). also a great source for entirely unused pampered chef items (I'm guessing a popular gift but not as far as the recipients are concerned).