"It's the 2003 GT-S with the 6-speed, fully loaded. It is unmodified, bone-stock, and in great condition. Exterior color is Spectra Blue, which really pops with this car.
2003 was a mid-cycle refresh year for the Celica, which brought better interior materials and other improvements. If you're going to get the base GT model, get a 2003 or later one, as the earlier ones are prone to piston ring issues.
I bought my car a two years ago at 86,000 miles, and I've been using it at college, so most of the driving I do is in town, but it has done a couple road trips.
I love this car! Best car I've owned, possibly the best car I've ever driven. With the GT-S comes the 1.8 liter sports motor co-developed with Yamaha and a tight 6-speed transmission. If you keep your foot out of it it gets up to 33 MPG. I average 26-28 in mixed driving. When you put your foot into it and gets the revs up there, this motor really comes alive! The rev limiter is around 8000 RPM, and past 6000 RPM it goes into an "aggressive cam" where basically the valves open more and it lets in more fuel and air which boosts the power of the engine without turbo/supercharging. The car is pretty quick under normal driving conditions, but because the gearbox has short gears you need to shift a lot.
Interior: My car has the perforated leather seats, which are comfortable. The sunroof eats up headroom. I'm 5'10'', and I fit perfectly, and I'm able to ride in the back seat just fine. Anyone 6'1'' or taller might brush the ceiling, so if you're tall try to find one without the sunroof. The front seats have plenty of legroom, but the back seat is tight. Don't buy this car if you plan to use the back seats on a regular basis. The materials are mostly hard plastic, but the look good. The only rattle comes from the trunk from when someone broke in and damaged a panel. Trunk space is pretty decent, and the seats fold flat. I've fit quite a bit of stuff in this car, going to college and back.
The styling is awesome on this car! Nearly everyone thinks it's newer and far more expensive than it actually is. It turns heads and gets thumbs ups. I replaced the front bumper soon after I got it because the original one was pretty scraped up from hitting curbs. This is a low car, even at stock height, and curb damage really shows.
Maintenance has been alright. I've had it for 20,000 miles, and it hasn't let me down (knock on wood!). It does require premium fuel and full synthetic oil, so prepare yourself for that. Also there is a unique "lift screen" that will eventually need to be cleaned. There are videos on Youtube that show how, just keep that in mind.
Handling is sharp, the steering is crisp. I've taken cloverleaf turns at high speeds without understeering. It practically rotates in turns with just a slight hint of oversteer, which is surprising for a front-wheel-drive car. Note: I don't drive aggressively very often; please drive safely. This car is rare partially because so many kids have wrecked them. The suspension is sportier, so road noise and harshness are more pronounced than your average family car, but it is not terrible by any means. It can pull commuter duty easily.
In short, the Celica GT-S is a solid sports car that is usable enough to be a competent daily driver. In everyday driving it does well and runs efficiently, but unlike most other cars it leaves loads of room to play and have fun with it at high revs.