I had to get my rear rotors replaced on my 2008 Scion recently after 62,000 miles: $500. The front ones could probably use replacement too, so there's another $500. And, over the past winter (when I only had about 48,000 miles), I had
this problem, which they wanted $1000 to fix. Somehow, that seems to have fixed itself, but it seems as though some sensors in the hub get affected by the road salt, so it may pop up again this winter (when the problem occurs, the traction control, anti lock brakes and vehicle stability control stop working - nice time of year for all that to happen).
Add in the $400 charge for the 30,000 mile maintenance (where I don't think they really did anything), and that's about $2500 in maintenance costs over 3 years for a $15,000 car. I thought that since Scion was made by Toyota, then it would be reliable. Turns out it's not.