We live in a "non-disclosure" state (AK), and past sale prices are not in the public records, however much critical information is: Lot size, square footage, ZONING (one of the most important IMO), # of beds & baths, year built, date of last deed change, city/county assessed value (do not mistake this for market value), taxes, and other info is (here) readily available on city/county websites.

Baltimore though has a rate of 2.25% of the assessed value, and they assess the properties often at unrealistically high values.Every market has it's strengths and weaknesses...I just feel that the DC areas market weakness is multifamilies.

The 2014 property value assessment through the county was $197K and the taxes were $2500.  

Sadly, tenants don't always have a clue.I give my tenants a MOVE IN CHECKLIST, and I tell them to note anything they want on the checklist, because that will be referenced when they move out and charges will be assessed for damages not noted.  

The tax assessment is $180k, and I would say (rennovated) you could ask that, but would actually get closer to $160k because properties in this market tend to sell a good 10-15% below asking after sitting, it's a heavy vacation/2nd home market. 

The main reason I don't like condos is the looming special assessment or possible hike in the HOA fee that will wipe out any profitability you have.You definitely should purchase all cash and make sure you get $700/month.  

Buyers think that assessed value is what they should pay.

The county has it assessed at 180k.

Just by assessing what has been provided, I do not believe this will bring a positive amount of cash flow.  

In California, the assessed value can be VERY far off market value due to the various CA ballot propositions that set assessed value upon transfer, and then only allow very small increases per year.