Saw a tracker thread somewhere, and got interested: Just bought a used one on eBay, complete with instruction manual-- just need to go online to get service established. For once, my wife's as excited about this acquisition as I am (unlike most of the toys I buy)... When an old guy wearing a back brace with a folding cane in his trunk likes to ride alone on a 17-year-old motorcycle, this handy little system seems to make a lot of sense!