Anybody ridden a fairly low-end folding bike, like one of those <$500 Dahons? A friend bought a $20 no-name folder in a thrift shop a few days ago, and I don't want one of those, but the idea is sort of intriguing. I've been looking at the Dahon website and they have two or three bikes around $300-$500 that look like they'd work for casual use. I've already got all the bikes I need, but hey, if you can put one in the overhead bin . . . .