The cost of ice fishing sonar systems and flashers varies widely based on technology, screen resolution, and portability features. Entry-level portable traditional sonars or castable smart-device pucks can range from $100 to $300. Mid-range to high-end ice-specific flasher units and high-definition CHIRP color sonar systems equipped with GPS mapping and detailed mapping capabilities manufactured by Garmin, Humminbird, or Vexilar typically cost anywhere from $500 to over $1,500 depending on features.