What sources are investors looking at to find good deals?

[AJ Satcher]

*To be even more specific, I am a beginner investor looking for a duplex in the ATL area to house hack

I am very curious about what sources investors look at to find deals that work for them? I pretty religiously check out Zillow, maybe some Redfin and even realtor.com (a few others as well). However I have this feeling that these aren't the tools that most investors use to find their deals. Now I could be wrong, and maybe investors do find these resources useful... but to me these places kinda feel like the "duh, everyone is going to check this site out" and therefore there aren't many deals. If anyone has some insight, it would be appreciated!