When I lived on the Olympic Peninsula, all yard sales were awesome, mostly old retired people. Then I moved to east Texas and yard sales sucked unless you had a passel of preschool kids to get rigged up or needed give away oil field cups and hats or Christmas decorations. Here about one yard sale out of 5 has anything you would want. But I always ask about lawn mowers and often they will give me a couple. I get $75-$100 for them after I give 'em the once over. I asked at one yard sale last fall and ended up with 2 push mowers, 2 tillers, a snow blower and a chipper/shredder all for free. 2 weeks ago I had 2 riders dumped off in the yard for free. One was a rear engine Honda with pull rope start. I put gas in it and it fired right up. The belt was on it wrong, fixed that, mowed about 30 minutes. I put it on a local consignment auction and got $350. The other rider is a Murray with a briggs twin and hydro. It runs great but I need a nose for it. Same story, fresh gas, new battery and straighten out the belt routing. I've ran a couple tanks of gas through it, mows great.
Not a bad little sideline for an old hippie living the subsistence life style.