Holux GM-210 GPS Holux GR-212 Xtrac Waterproof GPS Navisys GR-300 SiRF III USB GPS Dongle (4 ft Extension Cable included) (Supports Windows, Mac, Linux) Holux M-215 USB GPS Receiver(MTK Chipset, WAAS) GlobalTop GMR75 USB GPS Receiver (32 Channels, WAAS) Royaltek RGM-3600 SiRF III USB GPS Receiver Regular price: CA $79.95 Sale price: