Hello- I owned a Saturn in the past and here's what I can tell you.
The original Saturns were relatively reliable cars. They were built simply, and for a cheap car, who can argue with dent free panels? The problem with saturns however, is the engines. They burn oil. I changed the oil in this one religiously at 3k or lower yet it started burning signifigant oil at about 70k, this got worse fairly quick. I soon realized this was a pretty common problem with Saturns, and aquaintance of mine informed me he had replaced the engine on his already (50k) due to low oil pressure seizing the engine.
If this is a second generation saturn, say 95 an up(?) Forget it, not only will you be smoking but you'll be in the shop all the time for the rest of the car.
Anyway, have the compression tested and look for sludge and oil burns on the dipstick. Otherwise, it could be a nice reliable car..

Jason