My recommendation would be to choose potential markets - in several price points - that have strong rental demand and year-over-year rent increases and that also are in markets that are appreciating. 

With strong market demand, it sold the same day for $185,000, resulting in a solid profit.

Quote from @Michael Ewers: Hey y'all, Wondering what is the best marketing strategy for obtaining off market leads?

I like following stock markets, cryptocurrency markets and love to travel. 

It's not difficult to find tenants if the property is marketed correctly.

There are multiple markets you may want to consider.

For example, I have a duplex that I tried to sell off market through Facebook Groups.

Low or no down, seller financing and low or no interest with a balloon payment later is the holy grail (location, building condition, market also matter but it sounds like you have all that).

Might be time to look off-market.

Homes Are OverpricedHousing could be overvalued by anywhere from 10% to 35% based on how investors are actingThe stock market is pricing portfolios of American homes at a hefty discount to what houses are changing hands for in the open market.