A mountain bike a couple years ago.
I got a puncture on the way to work so I quickly formulated a plan. I pushed/walked the bike for another mile or so and locked it up against a fence at a busy junction. At this junction is where my route joined with a bus route, so when I finished work I could walk back to my bike, unlock and jump on the bus to get home. So i locked the bike up, was concerned about the quick release seat, so I removed it and took it with me to work.
I ran the rest of the way to work and was just about on time. Anyway, I worked from 7-11am, walked back to my bike and it had been nicked.
So yes, someone stole a very basic (shoot) mountain bike with a rear puncture, and no seat, between the hours of 7 and 11 in the morning