Recently, I sold a rental that was cash flowing in order to do another project and in the process, my realtor said that his motto was 'never sell anything'. 

A similar house recently sold for 680k.

Chris,I sold distribution lumber in Maltby for lots of years and had lots of good contractors come in that fly under the radar. 

For instance, I sold a rental back in 2016 that had been occupied by tenants since 2009. 

Hey everyone,I've copied the HTML from Zillow and posted to Craigslist before. 

Its been established since 2009 and was sold in 2016 to 2 friends and they are having issues and fights and want to sell.

I sold a few properties last year as well for cash in order to buy a couple of rentals outright that cashed flowed well at a low purchase price.

So good, in fact, that when she left an adjacent area several years ago, I sold my property there because I knew there was no one else that would manage them as well as she had.

You should ask for a copy of the vendor's invoice so you can see if the charge is legitimate.  

As people have suggested above, these tend to require quite a bit of effort to find, negotiate and purchase.It is possible that you might find a significantly under-valued property where a hard money lender would loan you 100% of the purchase price on a multi-family (for example if it was being sold for 65% of the ARV).