Zillow Rent Zestimates is another option, but it admits it's not totally accurate, although its algorithms do take into account more of the items noted above.

You need an algorithm for IRR.

That doesn't protect against intentional NSF scenarios, but is nice when your payment is bounced out of the bank's payment algorithm based on anticipated direct deposit dates.

The software is run based on algorithms, so answering one question incorrectly can lead you down an entirely wrong path.That said, TurboTax can be great for small landlords who are willing to put the time in to learn about the tax code and ensure that the manner in which they are answering the questions will produce compliant returns.

As a long time appraiser i can tell you that the answer depends on the experience and skill of the appraiser, the amount of research and support they did, and the the assumptions and givens of the assignment.An AVM like Zillow or your tax assessment is like the blue book value, a statistical analysis of hundreds or thousands of sales that may be fairly accurate is depending on how conforming your property is, clean the data is, and details of the algorithm (Taxes values in my area will be based on 2013 values until the next reassessment in 2020. 

Too many institutions just plug you into pathetic and overly simplified algorithm.

Its algorithms can hone in on every geographical location in the Country by zip code.

Unfortunately, we have heard time and again about algorithms and formulas that will work regardless of market - and more importantly - they were not concerned about price point and neighborhood.

In short, it's an algorithm to calculate current home value.

I'd like some feedback here. . . we made some changes to our search algorithm and it looks like we're getting better results now.Additionally, we've added Jeff's suggestion to allow you to sort results by the number of replies.