FInding good deals on Duplex's and other multifamily

I am a new investor in the Richmond, Virginia area and had a few questions for the experienced investors out there. I see a lot of posts on the forums and from other on BP saying in their market anything from SFH to Duplex's and even Quads go from the 60k-200k range. In my market a small 3 bed 1.5 bath starter home in "decent" shape in a "decent" area starts at 150k. Duplex's are in the 300k range and quads in the 400 - 500k range. With that said the rents are a little higher, but how can a new investor find good deals in their area? I feel like I am missing a big piece of the puzzle when it comes to finding deals below market value and even off market.