As we approach the Spring home buying season don't look for any burst of supply, warns Lawrence Yun, chief economist for the National Association of Realtors. Home sales have been "stuck," he says, because there is just not much out there to buy. Home listing have increased slightly, but they're still far below average. And, with prices appreciating at a 10% clip in some areas, sellers aren't blinking yet. Home owners simply aren't likely to be in any hurry to list, Yun asserts, until conditions begin to stabilize.