Since sale prices are public record in our local court houses, most transfers of real property are available on local government web sites.
The spin you are looking for makes it difficult for the average person to accurately discern more complicated deed transfers in a commercial real estate venue. You probably not only want to work with someone in Baltimore that is a licensed REALTOR, but who also has extensive experience and training in these areas. Those individuals hold the designation of CCIM - Certified Commercial Investment Member.
They work with cap rates, roi (return on investment) issues all the time. My husband ,Kevin McNamara ,is a CCIM in the Ocean City, Maryland area. His particular expertise does not exend to the Baltimore area, but he has many contacts there since we live so close.
Good luck. It's a great time to buy. "Buy Into Fear - Sell Into Greed"!