Here we have a (possibly incomplete) list of GPS navigation system for $200 or less. We decided to stick with most common brands. Let us know if we’re missing any.
tomtom one 130 - $150
tomtom one 3rd edition - $148
tomtom one 130s - $199
garmin streetpilot c550 - $188
garmin streetpilot c530 - $180
garmin streetpilot c340 - $156
garmin streetpilot c330 - $127
garmin nuvi 250 - $189
garmin nuvi 200W - $198
garmin nuvi 200 - $161
magellan roadmate 1412 - $189
magellan roadmate 1200 - $139
magellan maestro 3100 - $104
magellan maestro 3200 - $101
magellan maestro 3250 - $186
magellan maestro 3100 - $144
magellan maestro 4000 - $155
magellan maestro 4200 - $188
magellan maestro 4210 - $181
navigon 2100 - $118
navigon 5100 - $199
http://www.navigadget.com/index.php/2008/07/05/decent-gps-navigation-systems-200-or-less/