The consumer-facing listing portal operated by the Houston Association of Realtors since 1997, HAR.com, has generated 4.7 million leads for HAR members and facilitated 1 million home sales valued at $190 billion to date. The more than 50,000 listings on the website generate 1.6 million unique visitors and 1.5 billion hits a month, HAR said. Source: Houston Association of Realtors.