It's just a right place/right time thing. Way better luck at flea markets, I don't even bother with estate sales. I have an eye for metals, despite my very poor vision. I can go right to the sterling amidst a pile of costume jewelry. Got a bronze Pulitzer prize & I'm sure the copper in it is worth more than the 25 cents I paid. On a bustling street in Dayton, Ohio I found a gold & diamond Tiffany bracelet. Yes, it's genuine. Sparkling from a gutter.