Buying topo maps for handheld GPS devices can easily cost more than the device itself. Garmin charges $120 for topo maps of the northeast alone, for a device th

Buying topo maps for handheld GPS devices can easily cost more than the device itself. Garmin charges $120 for topo maps of the northeast alone, for a device that costs 100-200. I've seen a lot of commercial uses for rugged palm pilots too, the special case software for that is probably quite expensive.