On two occasions I had the same guy try to sell me a bike in Eugene. It was pretty amazing, because I only go there a couple of times a month. He would approach us and show us his hand. It was either a fake or he had an accident or some condition. He looked like he was in pretty rough shape. He "needed to sell his bike for $25 to buy medication for the infection". I don't know what the odds are of getting hit upon twice (about three months apart) by this guy, but they should be really low. I'm pretty sure they were stolen bikes.

We lock ours up even in the garage!