Yeah, the bike guy answered, he had something super-cheap for me, an old road bike that they’d fixed up. It wasn’t exactly my size, but it would do. It was a 1991 model, a Trek, I think. It was in good working condition, it had some newer components, and it came with a warranty. I could have it, he said, for $475.
So I started looking at Craigslist — not just in Portland, but in other cities too. I looked at a wide range of midsized-to-large cities that I thought represented a diversity of urban layouts, bike prevalence, wealth, and so on: Austin, Miami, New York City, Phoenix, Portland, San Francisco, and Seattle.
From each of these cities I collected an extremely basic data set: the asking prices for the 50 most recent cars, trucks, and bikes advertised. Then I looked at the medians. Here’s what happened...
In the chart that Robin created, there's an inverse relationship between used car prices and used bike prices. In other words, in cities where used bike prices are the highest, used car prices are the lowest.
Read more at Freakonomics blog.