When Boulder was selected to host the Sundance Film Festival, one expectation was that accommodations would be less expensive than in Park City, Utah, where festival attendees competed for rooms with ski tourists. But dozens of homes in Boulder have already been listed for more than $5,000 per night during the festival, far above what several festival regulars said they paid in Park City. Property managers expect prices to fall as more listings enter the market and overpriced homes go unbooked.