The price sounds right if it's in good shape. I had a '97 850 and put 430,000 kms. (270k miles) on it with literally no problems until the end, when the engine was leaking oil and the sunroof was leaking rain (and I got CDN$5,000 for it when I sold it). The first used '98 S70 I bought was a lemon, the second one is a bit better (3 of 4 electric door locks failed, cracked exhaust manifold, leaking steering rack), but I also do most of my own work so it hasn't been outrageous to repair (with used or aftermarket parts). But it's a lot of car made with quality components and I still feel it's worth it if you don't pay too much to buy it.