@Bob Hines nailed it about about confirming the info and not trusting the sellers. 

You hold no beneficial interest in the property and are marketing someone else's asset.Now, once you have a track record & relationship with a buyer, I don't think there is anything wrong with calling that buyer up, while you're in the process of nailing down the final details of a contract, to give them a heads up just to see if they are interested. 

I did notice that the siding was coming off of one of the windows revealing a sheet of plywood that had been nailed over the window.

It’s active income, so you hit the nail on the head.

@Daniel Green nailed it with CL and Facebook, but I also like listing myself on Zillow as it propagates to Trulia and Hotpads.

My suggestion would be to nail down your strategy first- buy and hold, BRRRR, house hack, ect and make sure your partner is on board with your strategy and goals as well.

@Michael Wagner hit the nail on the head in both of his posts regarding market supply & such so I'll try to address any of your remaining questions or else you'd just be reading his words again in my post.Please note that most folks should be pricing a Facility based on the Income Valuation method - as it has been performing for the past 12 months. 

Zev in a previous answer hit the nail on the head.

There are a bunch of holes in each strap and every hole must have a nail in it.

Nevertheless, I unfortunately cannot help you with your starting offer because the Baltimore market is drastically different than the Dallas market, but if you're able to nail that down, you still have the backup plan of an option period in which you could always back out if your numbers are way off.