I wonder... with something as powerful as this, do you find yourself no longer needing a realtor to get MLS data or comps?  

@Taylor Green I know my local MLS includes data about past transactions for any given property, so yes, a real estate agent is probably your best bet. 

@Tom Mole  I interested in these properties in that is a low barrier to entry into the rental market. 

But if you don't have the 300k or more for the price of entry then whats an investor to do..?

As noted by @Sean Brooks your best bet is to have a discussion with the listing agent, state your position with empirical data (recent sales) and hope to get a call in a few months when the seller/agent check in with reality.   

I have been sitting on the sidelines for the past couple years, gathering data, exit strategies, markets, etc, and this website has been a big part of it all.

If your eviction data comes from a third party, then you have to comply with the FCRA.

But this is an entry level neighborhood, probably 85-90k rehabbed, with some listings for 69k, and some sluggish comps.  

I started to think about the impact on comparable analysis and how the inaccurate data might artificially increase values in my neighborhood as the price/ square foot was $20 more.

I once did a back of the envelope calculation on long term rates using empirical research and data on the relationship between the fed funds rate and the 10 year treasury.