Here's another titled and registered RZ500 for sale:
quote from seller's Craigslist posting:
Super Rare 1985 Yamaha RZ 500 CA registered - $7900 (Encinitas)
1985 RZ 500 22,000 original miles never been apart in excellent original cond.alway's adult owned never modified.
At $7900, this falls right in line with other RZ500's listed previously.