You have to take proforma data from agent and adjust it to your expenses and rents to see if it makes sense for you.hope this helps.

An anonymous whistleblower is alleging that Zillow steals listing data from agent websites in order to compare it to data scraped from realtor.com and see where its own site is falling short.In a letter to attorneys for realtor.com operator Move Inc., a presumed Zillow employee claims knowledge of illegal actions at Zillow and points Move to specific people, documents, keywords and locations to search for evidence of those actions.The allegations support Move’s claims of misappropriation of trade secrets in a lawsuit filed a year ago against Zillow and one of its execs, Errol Samuelson, a former Move employee.

Another reason for getting the data:  As an investor I would need data to support paying a premium for a property.  

If attaching it is not possible, what data criteria should I post?

Do the same thing with several neighborhoods and you build yourself a wealth of data.

. $39.99 a month or $59.99 if you add their excellent foreclosure data.

Does anyone have a Go-To source  or two for market specific , economic, employment, and demographic data?

Until I take my next step in REI and the majority of my business is comprised solely of assigning contracts to other private investors; I only want to be thought of or considered to be the number one wholesaler; at least in one way or another to every quality investor/professional that I have the privilege of I coming acrossI will always need as long as I am a real estate investor; all of the tricks, tools, & trades I learn through becoming a tremendous wholesalerI want every aspect of my lead generation, my property evaluations, my deal analysis, my renovation budgets (determinations, estimates, & timelines) the complete all in requirements in both time and holding cost spent from start to finish, establishing ARV’s, and of course nothing less than 100% picture perfect all-inclusive, data thorough, as easy to say yay or nay on in moment style property breakdown presentations!

@Heather Ippolito  if your taking the data from the MLS listing they are listing the annual tax's not monthly  .. what you do need to figure out tho is if the tax's are low because of owner occ status and will they rise when they are turned into rentals.In many states owner occ's get about a 50% discount compared to investors.. they get it through their homeowner exemption...

Most government agencies that keep this data are online and all have phone numbers.