As a former Florida car, I had to replace all the weatherstripping when I purchased it, new brakes, rotors (badly warped, use a torque wrench!), shocks and serpentine belt.
Fuel pump went bad last year, and I replaced it with genuine GM parts, suggested by my local "generic parts" store.
I have recently replaced both idler pulleys, both rear wheel bearings and all 4 U-joints in the rear; 1 wheel bearing was making a noise, and the joints on the right side were beginning to squeak, so I replaced them all to be safe. (I do my own work, so it's not that expensive)
Currently replacing the rugs, seat covers ($$$), and re-doing the whole interior (She's worth it).
Quick enough to keep me happy, handles well with good tires and when you leave the top on (lots of body flex).
Very comfortable on a trip, excellent gas mileage (averages 24 mpg to-from work).
Insurance isn't bad if you're over 50 and don't have a lot of tickets (I couldn't afford ANY Vette until I was 50!)
Dependable car, not really any problems to speak of that wouldn't happen with any other 15 year old car.