I know this topic had not been discussed often but I found this site that sells gps receivers for a darn good price. And it comes with a free 2gb sd card(add $23 for mini sd). Use these code to make it even hotter:
AX15 = 15% off gps receivers
AX10 = 10% off gps software
AX5 = 5% off bundles
AXSpecial = $15 off i-blue gps reciever
http://www.buygpsnow.com/bluetooth-gps_9.html
EDIT: Only the OnCourse Bluetooth GPS Receiver Edition 2 comes with a free 2gb sd card.