Both for sale, and on the road I've seen lots of SOHC4's in the San Francisco Bay Area. Young riders and old. There are at least three various SOHC4's that park within a three block radius of where I work in SF: a 500K, a 550K, and a beautiful red 400f. There was a dry spell on Craigslist for a few months earlier this year where I saw very few for sale, or they were just getting snatched up REALLY quick, but lately there has been an influx of good bikes with cheap asking prices. If I had the time space and money this summer I could have picked up a dozen bikes to flip.