EM-406A GPS Module

via Adafruit
$422.40
SKU AF-99
Sirf III chipset GPS module with 6 pin cable. Includes power/lock indicator LED and backup supercap. One of the nicest GPS modules I've come across
  • 5V power, ~40mA current draw
  • 45s cold start, 38s warm start, 8s hot start
  • -159dB sensitivity (I tested this a lot in the canyons of downtown New York)
  • 1.2" x 1.2" x 0.4"
Lots more info including datasheets, software, etc. available here