property search engine

Hi, i am looking for a clone of a property search engine website that crawls other property sites that are registered and pulls their details onto our site. the website i am talking about it www.globrix.com. Only experienced programmers with a proven track record to apply. please also provide sample sites and the platform that you would build this on and why. We are not sure with programming options are required for this, so only webstie design has been chosen Please post similar website link if you have done before... If you have not then don't bother bidding