So you’ve fallen head over heels with a particular neighborhood—but none of its homes are on the market. Just because there are no homes currently listed doesn’t mean that no homes are for sale. Realtor Frank LLosa of Frankly Realtors shares a few pro tips on how to find—and get inside—those unlisted properties. Look for dog walkers—who are typically out in the neighborhood up to three times a day—and postal workers to get the unofficial scoop on the real estate gossip. And postal workers will know when mail is backlogged at a home, and even if there might be a foreclosure looming.