Interest rates have gone up significantly, income does not appear to be rising (you'd have to find the #'s to see what the trend is), and prices have definitely increased dramatically the past few years.

If you want it to look more "upscale" or "trendy" consider refinishing it with a different stain vs just putting a poly coat on top of it. 

If you look in most major cities, the most trendy and popular neighborhoods with the most valuable real estate are often predominantly older housing stock. 

I bought a house only a mother could love in a downtown neighborhood of Oklahoma City. 5 blocks away there is a "district" with clothing boutiques, trendy restaurants, breweries, and wine bars.

This is a rather annoying trend I have found: The duplexes/tri-plexes/quadplexes rarely have split utilities.

There are trendy areas of Sacramento close to downtown and recovering areas like @Al Williamson always mentions...Oak Park.  

Over the years many Real Estate markets are becoming inaccessible for investors and home buyers that do not have lots of money.This trend is just getting worse.

Depending on your tolerance, you can still find cash flow as long as you are ok looking in less trendy areas.

Look at local unemployment numbers and be sure the trend is in the right direction.

However, each winter we tend to get more guests around the holidays, so it seems the trend is changing.