My best buy from a garage sale was a sterling silver flatware set for 12 for $20.00. The lady no longer wanted it because it was her mother's "old silver." I looked on Ebay and others went for close to a $1,000.00.
I generally buy books and stuff for the gradsons, fabric, clothes, old linens. My favorite buy was old hand made underwear, a petticoat, bloomers, bed jacket and a bra like top. Handmade lace with tulle and silk. It must have been from the late 1800s to early 1900s. The work in these pieces was just stunning.