Comps are simply what other houses(similar configuration, age, square footage, geographical area) have sold for. 

Public information, current broker and agents ect… The planning is to create centralize database that will maintain all information for specific geographical area around where I live.

I sell manufactured homes and I saw a listing of one of my homes with the same pictures, different description and triple the price on CL.

@Jason Carter  check with the county clerk there, they will probably need the legal description in order to look up the liens.

Just walk right into your county surveyor or planning department with your map and see if they recognize these are legal lots of record.. or you could order a title report that should give you individual descriptions if they are legal.then you would talk with city engineer  or City manager about improving them so you could build on them if that's what you want to do...

With my Buyer's Rep agreements, I am always very specific on the market areas I will help the client with...I will usually go down to the community level, but with some investors who have a wide geographic range, I will use counties.    

Here’s a brief description:(1) Recovery: Negative rent growth; Below inflation rental growth.

What I mean is that some responses may not apply to your specific situation, or may be addressed differently based on geographic areas, and so forth.

But there is a difference in understanding the geographical areas, being able to see the neighborhoods, etc IMHO.

Won't even speak of a legal description "closing" as you can have title problems if they don't.