Where can I find duplexes, triplexes, & quads listed for sale?

[Ethan M.]

I'm interested in buying a duplex, triplex, or four-unit building as an investment.

I'm looking in the Raleigh/Durham/Chapel Hill Triangle area of North Carolina.

If you check "multi-family home" in Zillow, Trulia, or Realtor.com, they think you mean "show me single units in multi-family buildings." I'm trying to buy a whole building.

I'm aware of loopnet.com but they charge $244.95/month and I'm not even sure how great their listings are. Maybe they're great. If so then fine, I'll pay for their service.

But before I shell out that kind of money, is there some website that has some listings where I can get an initial idea of prices and what kinds of properties are available in the area?

Maybe there isn't? Perhaps buying rental property is more a thing of knowing the right people?

Any insight or advice would be very appreciated.

Thanks!