I think its trash. High miles for that kinda car. I got my Neon with 62k so thats more or less fine. The cavalier has 2.4 liter engine correct? I hear that the 2.4 or the "quad four" engine has problems that come around with 80k+ miles. I would take it to your mechanic for an examination, because thats what I did with every car I looked at when I was shopping. If they wont let you do it, they are hiding sometihng.
04 Mazdaspeed Miata #2373/4000: IHI, BBS, Harddog, Flyin'Miata.