I don't even do well at yard sales anymore. I thought they were great 20-25 years ago, but now they have become a regular business and I can never find good deals. I have a friend who is an antique dealer and she still pokes around in the strangest places! Once she had me stop at the curb and she pulled a picture out of a garbage can - turns out it was worth 5K! Of course she knew what she was lookig for. Another time she bought two lamps for $5, went to Walmart and bought two shades for $10/each and sold the pair at the Pier Antique Show in NYC for $290- and got to keep the shades because the designer who bought the lamps didn't want the shades!
I do love hitting the flea market/antique stores - and I still find wonderful treasure there!