What is the Zillow of Multi-Family homes?

[Matt A.]

What is the Zillow of Multi-Family homes?
I'm interested in buying a 2-4 unit Multi-Family home in Atlanta, Georgia (and other parts of the country). Which websites show the most Multi-Family homes for sale?
I find Zillow and Redfin show pretty much all single family homes that are publicly listed for sale. Are there similar websites that show pretty much all Multi-Family homes that are publicly listed for sale?

[Taylor L.]

Not really. Investment quality deals rarely hit the MLS, and when such deals do in major markets, they get picked up pretty quickly. @Russell Brazil has been on the warpath recently re: mis-listed deals in his area, perhaps you can look for properties in your area that are not correctly listed?

Crexi and Loopnet are targeted at more commercial & investor deals, but for the most part they're pretty picked over.