In addition to tools, just any kind of old world kitchen gadget (that now has a modern electric option), farming needs, clothes, jackets (especially these, can get some really nice jackets and coats for next to nothing). About a week ago, I got two high-end brand (faux) fur-trimmed coats in nearly new condition, for $15 each. The wife was ecstatic.
Internet typically has some different tools that vary by area. Could be as simple as just a Google search for nearby antique shops, or there may be different antiquing groups in your area, that can direct you to specific stores. Especially look for areas (and you could Google on census results) that have a high concentration of the elderly, as these shops will typically be stocked via estate liquidations, which are good for the following reasons: 1) relatives simply selling all items off for one low price to the antique stores to get rid of the items, 2) shops see so much stuff, they likely don't know what they have, as they too try and liquidate it, 3) these folks will have more items that are older from times when they didn't have modern solutions to use instead.