See TVNAV for prices on Garmin. They have reconditioned units at times. Also join Garmin Group. I have a GPSMAP 76S. The limits of the Car only units are you can't use them for anything else like geocaching. I have mine wired/mounted on my UTV and use it to map roads and trails. I also have used it to map hunting areas. GPSU is a freeware/shareware program for maintaining trackpoints and waypoints and plotting them over any JPG/BMP/Scanned image. Makes a good map. I plot over topos and ariel photos. I can send copies of some of my maps if you would like.