New-ish Investor Overwhelmed by Possibilities

My name is Suzy and I live in Eugene, OR. I have a duplex, a single family home in a college area and joint ownership in an apartment complex in S. Cal. I have a "freedom number" I am working to achieve by buying more rentals. My trouble is that when I look at Zillow or MLS, there is SO much out there and so many that look like good deals, but I wonder, if they're such good deals, why are they still out there?! To find and purchase the units that I have, I worked closely with a realtor who is also an investor... and very busy. I would like to be able to confidently locate great deals myself. Any advice on this would be much appreciated! I'm also just wanting to start networking with people in the area, so if you're around Eugene, and looking to network, let me know! Thank you.