Bitrake is used to aggregate sale prices on all estates for sale in Denmark. Its pretty easy actually. We have configured a script that parses all the interesting pages at http://www.boligsiden.dk/ i.e. all pages that displays an estate for sale.
The data sendt to the Boligven infrastructure is then used for statistics and matching algorithms to create a vivid user experience.
Visit Boligven to see the data in action.