Realtors - Have you checked out the investors analysis in RPR
I was checking out the Realtors Property Resource website (http://www.narrpr.com) and found it has a Property Analysis for Investors page that looks interesting. I know its not as good as BiggerPockets calculators :), but it may be worth a look.
You have to be a member of National Association of Realtors to check it out. Put in an address in the search bar and the Property Analysis link will be in a blue box in the property details page.
Check it out and post an opinion on value.