I spend a few weekends during summer driving around looking for Yard sales. It's not even about buying stuff, I just love haggling, and I'm good at it.
Among the strangest thing I've seen.
-a dozen 200 pounds Metal Railroad sections.
-Kittens
-Old toilet
Best Deals I found was for my wife who makes costumes as a hobby.
An old retired seamstress was selling out her material. I offered to buy out half the yard sale, she was so happy to get rid of so much stock all at once she practically gave it to me. There was a few hundred yards of Fabric on rolls of 10 to 50 yards and boxes of short pieces "1 to 9 yards" in various colors and materials. Enough Zippers, Velcro, Trim, rolls of Threads in all colors to last a lifetime. I did not even haggle when she asked me a 100$