I buy what I can used. I don’t usually buy used shoes. I never buy used socks or underwear. I seldom buy used computers. Other than that, it’s all fair game.
I have a good relationship with a little children’s consignment shop down the street—a great source for kids’ clothes/toys.
My all-time favorite sources are Craigs’ List and Freecycle (freecycle is an online group—find one in your local area—which allows people to post items available or items wanted/needed).
I keep a running list of items wanted/needed and then I just watch for things to come up. Here’s an example of what’s on my list right now.
Girl’s play shoes, women’s size 7
Girl’s t-shirts size 4T and 5T
Rubber rain boots (both kids)
Dutch oven or similar large heavy, lidded-pan
Legal paper (I often see this come up via Craigs’ List and Freecycle)
The list goes with me to garage sales, thrift shops, etc so I always remember to check those areas.