How do I market for off market multi families?

[AK Fowler]

I own a SFH and duplex and I'm looking to move into apartments. I'm really interested in finding my first apartment building to purchase. I'm looking for off market deals, C Class properties that I can add value and forced appreciation.

I've started gathering a list of apartments within my area by driving around town and finding apartment buildings. Is there another way or am I on the right track? I've also looked up apartments on rental websites and craigslist to help build my list. I'm also in 2 REI groups but many are Flippers and 2-4 unit Buy Holds. I'd rather stay in my local area before going into other markets but understand that I might just need to go to other markets.

Any help is greatly appreciated!