If you are looking at a tax assessed value or Zillow etc, then that value may not be very accurate.

This is my first time investing in a property so i don't have an accurate operating expense estimate. 

I know these numbers aren't always accurate, but what is a good explanation I can tell my clients.

Please tell.Is the summary given by @David Johnson fairly accurate?

Are you sure all of those numbers are accurate?

http://www.cookcountyclerk.com/tsd/delinquenttaxse...do you think it is pretty accurate ?

Is my ARV accurate?

My goal is to target folks in pre-foreclosure in a specific area I am interested in and I would hate to use a list broker if their data is not accurate or correct at all. 

Also could you tell me how to get accurate numbers on rehab costs?

My brother and I decided to NOT go forward with this deal given the small cu de sac, difficulty of getting an accurate value on it and some repairs that needed to be done.I will say that one of the two listings at the front of the street sold for approximately $180k (haven't seen the exact number on the assessor site yet).