There is nearly an unlimited amount of content on the site. 

I've been looking on the big common sites like Century 21 and Zillow, but I'm only finding individual units in Townhouses and such. 

Or are they refusing to move until forced out the door, and in that case they'd lose everything?

After accounting for vacancy, I would lose money every month.  

Any sites BP crew can recommend? 

I come with a different set of skills and experience, which is still related to what most folks on this site are doing yet it is still different. 

Print your flyer....take it to all the investment clubs....put it on Craigslist and all the other fsbo sites....and if you really want to open the market....get a realtor to put it on the MLS for you.   

Google and other sites have keyword generators or suggestions, but I just can't find what I feel I'm missing. 

I was clarifying your statement "officially...sometimes realtors will submit the sell price to the MLS, but it's unofficial and optional),"Agree - the MLS Sold Data is not transported to any sites without REALTOR access, and does not attach to the deed.

When a target property surfaces, be prepared to act on it within HOURS not days.Be prepared to show a solid proof of funds (not a print-it-yourself POF from a hard money site) and to submit a reasonable offer (most likely 97%+ of asking price).And if you have a good agent, you'll get that property under contract and start you due diligence.