If you are trying to determine whether a house is a viable flip in an area for investment, again, you need to work with a real estate agent that can really guide you properly. Market value in Phoenix is very dependent on location and can comparable homes for ARV can vary dramatically depending on the subdivision.
Hope this helps and feel free to expand on your question, I know that any number of us would be happy to provide additional details.
Realty One Group
Coldwell Banker Residential Brokerage