@Felicia Richardson I basically just found neighborhoods with duplexes that I felt matched my criteria (safe, in reasonable shape, strong rents in areas that were either growing or would remain stable), used Zillow/Google Maps to help get the addresses for all duplexes those neighborhoods, and then typed the addresses into the county assessors website (not sure if your county will have a site that allows you to search properties by address, but ours does). This gave me the owner's names and mailing addresses for all the properties I was interested in. I then just typed up a quick note saying I was interested in buying, and mailed the letters out. A bit time consuming (you could probably pay a virtual temp to do the legwork) but all told just cost me some time and $100 on stamps and envelopes. All that being said, I lucked out because of the 120 or so letters I sent I only got 2 replies, one from the company that sold me the duplex I now have and one saying basically to leave her alone. Good luck on your search.