I'm always checking the side of the road.
And, I check the free section of craigslist constantly.
I've gotten:
2 lawnmowers
1 string trimmer
1 leaf blower
1 hose keeper
4 tiki torches
and, we went dumpster diving behind Home Despot the other day and scored a ton of free plants. Even one tomato plant they were throwing away that had three tomatoes on it! It's in our garden now with several more fruits.