Talking about Andrew.
You have to check out his new book "IT for property people". Click here.
One more thing, from the article above regarding CoStar.
"CoStar's proprietary data doesn't come cheaply to its clients and presumably would be a premium feature on Google. One San Jose brokerage house pays $9,000 a month; larger corporations can pay up to $20,000 for information on commercial buildings that includes high-resolution photos of the exterior, lobby and loading docks, 360-degree photos of some sites, floor plans, marketing notes and sales data."
Maybe time for us Swedes to upgrade our pricing! ;-)