I also have an '03. I bought it last summer with 28k miles on it. Other than an oil change I've done nothing to it and it's been absolutely fantastic. I've driven more expensive and faster cars but this is by far the best car I've ever had. I've been in love with the S2000 since they first showed up in dealerships. And in my opinion the 2003 is the best one of all to have.

 

I made a tentative deal to buy a 2001 with only 4300 miles on it. My friend owned it since new and I did all the maintenance on it several years ago. It's been driven twice a year year on very short trips. Drives like a dream. Plan to drive this car on weekends but no problem areas I've seen so far on the car. The tires will be replaced as they are the originals.