Alternatively, they may suffer from deferred maintenance or {partial} functional obsolescence or, they may have an issue (asbestus, mould, etc) which scares off the average buyer.  

They managed to infest the building with bugs, destroy walls, urinate everywhere, and generally leave the place looking and smelling like a total POS.When I was buying it, I went through, generated a scope of work that would result in a clean, simple, functional and cute home.

You will find that you'll receive a much better response, rather that your first post asking for an agent in your area to run CMAs and absentee owner lists for you...If you want to find specific people in your area, you can use the member search function under the Network tab.

Good functionality and priced right for an entry-level investor.

Since Google got its start as a search engine, I think that is one of the best functionalities that they have.

Your net worth is a function of you network after all.

To make it functional, the pathway to it needs to be to the main house, not going through a garage, it also needs to be heated and cooled to be living space, best tied into the HVAC of the home and have a window, natural light not so much as legal egress.  

The unauthorized tenant, leaking faucets, non-functional smoke detectors, leaking traps, and ac filters are a big deal. 

Plus working for multi-family/commercial real estate doing many of the same functions only as an employee and therefore no license needed.

As with anything, rent + vacancy is a function of supply/demand of mostly jobs.