I've found that I get 1 out of 25 numbers are incorrect, which is roughly 90% accuracy rate on a 1000-lead list.

Obviously volume and repeat business has a positive impact, but you can get within 20% accuracy by simply making some calls.I know 20% margin seems like a lot, but as a newbie you should be working on those margins anyhow.Good luck! 

Does anyone with the experience and time have a couple of minutes to review this for accuracy, depth, and breadth?

They also come with another 3rd party review for accuracy.

I would greatly question the accuracy of this site as well. 

Keep in mind that there is no substitute for an actual estimate based on when it comes to ultimate accuracy, since every project varies greatly in complexity.

This way you can find motivated sellers who haven't yet listed their property.Absentee Homeowners has been very effective for a lot of investors - but since Maryland is a pretty competitive marketplace, it's likely that most of them have received quite a few offers already.Think about working with a list broker to find some alternatives such as Seniors with Long-time Ownership (ready to downsize or transition to assistance) or Homeowners with Low Financial Stability Scores.Be sure that whatever list you get that it has been run through the National Change of Address (NCOA) to increase accuracy.

@Carl Mccrory, just my 2 cents, but the accuracy of these sites is really dependent on how entrenched you get into the data. 

Also it can be the most robust depending on the accuracy/certainty of your projections.But, in reality, the comparable (sales) approach is also used (in conjunction with the income approach).

This may mean your quality and accuracy will be compromised.