Thanks guys.
Yeah, mine looks closer to the lower picture, not quite that bad but way closer to that then the top one.
I'm now wondering if this bike only has the 17K and if it was a good deal. Could be this guy was a novice biker and habitually only used the rear brake for stopping. Need to check the front, that should tell me.
The fronts are half as thick as the backs, even when new. Look for the lines cut into the pad...that's the wear indicator. As long as there are lines, well...ya know.
17k's not unusual for back brake replacement. Depends on where you ride I guess. I ride in Dallas, where you are hard on the brakes when you're not hard on the gas. They go quicker under aggressive riding. I tend to get 20k (ish) on a set.