Tax assessor doesn't see the AVM BUT HOWEVER they have an AVM tool and human appraisers, appraiser does see the tax assessment - which may not have bearing on current value as is set from value when you purchased.

I did exactly this for my duplex purchase and his time was invaluable. 

Many of them have gone up 50% in value in the past five years and I would have looked like a genius to pick them up. 

This is a great forum with very knowledgeable members that will help to guide you in the right direction.The site has quite a few tools that can be helpful for new members.

After the first year I added a couple marketing tools.

There are some pretty nice discounts on many products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/proThe site has quite a few tools that can be helpful for new members.

(i.e. 8 Plex about $600k in value that has not be renovated in 15 years, etc...)

Both are very useful tools I just happen to like the interface with Batch systems better. 

Yes, it is true that when driving for dollars your goal is to find properties with deferred maintenance, create a list in a CRM (customer relationship manager) tool, and contact these sellers with the intention of signing a purchase agreement and assigning that contract to a buyer.

Definitely use the pricing tool.