Steady demand. Limited supply. That's what we are seeing in real estate markets across the country right now. Inventory is particularly tight within the lower price ranges. "The starter house is nearly missing in some markets," according to Jessica Lautz, managing director of survey research and communication for the National Association of Realtors.Of course, conditions can vary from one city to the next. But the overall trend in housing markets across the country is that supply is still f...