I think websites like Zillow and Redfin play into housing prices because they provide much more transparency to the RE market. Previously, you had to physicall

I think websites like Zillow and Redfin play into housing prices because they provide much more transparency to the RE market. Previously, you had to physically go in to a RE office and look at a binder of homes that are for sale. It was much more difficult to find comps and price houses correctly, resulting in a lot of opportunity to make a living. Then pre-zillow / post-internet, home buyers still had to talk to a RE agent to get emailed houses. Now anyone can sign-up, peruse houses and with 1 click, schedule a tour immediately.