56k for an 03 is amazing. That's like 6k miles a year. I do over three times that easily.
Just check for torn CV boots and the over all general maintenance and condition of the car.
The coolant system is something you'll eventually need to work on but at 56k miles I think you have a while.
Ask if they have history of any maintenance/repairs. It's not necessary but a plus.
Last edited by TomTomTuning; 08-19-2012 at 08:04 PM.