Not much, but there are occasional people I see with vans that drive around to scout for various things. Some people grab mattresses, some scrap metal, some furniture they'll reupholster. There's nobody in my neighborhood like me though on foot marching the entire circuit. There are some people who come from outside the area to scour during daylight, but they're mostly collecting cans and bottles, or going through trash bags. I don't do that.

Either way, I can find a needle in a haystack. Even if people regularly scout around before me, I find tons of things they overlooked, didn't recognize, or were too lazy to find... or there's just that much to go around.