I agree with @Matthew PaulOne of my rentals is a 3 story house with 4 baths, it's 2 blocks away from my "Official" job. 

But you seriously have to just stop payment, and block their phone number.

Find out what a DONE flip goes for on that block or the next block over.

I am in the process of buying my second but have hit a road block.

For exampleA/c condisation drain has a back up.

I now understand you were looking for the things that normal due diligence might miss.I had a person who bought a property that was in a larger town and there was the air space above the house that was sold so that no one could block another building or sign. 

Plumbing is usually fauces or a drain that is clogged.

Will see how quickly it sells, but suddenly this has become a drain on my cash flow, both to fix it and because it will be vacant until I sell it.

When she couldn't get any takers, her postings and messages just got more and more weird as the night went on.Admins finally blocked her and removed her posts, but I got to see them later when she tried to admit them as evidence in the Discrimination case she later filed against me.  

Second, even without selling the property, I could still refinance and tap in the equity to do other things, so I'm not completely blocked here either.