The C70, just like its sisters S/V70 and their predecessor 850, is a very
solid, safe, comfortable yet very fast car. With the indicated mileage,
assuming it's correct, you shouldn't encounter any serious problems as long
as it's maintained correctly. Make sure there's no damage as a result of an
accident.

Check the exhaust for blue smoke (at stationary revs and while driving it).
That may be an indicator of a worn turbocharger. Occasionally, problems
arise with fuelpumps, fuelpump relay's (103) and some sensors under the
hood.

Good luck!
Marc (1999 V70 2.4 20v 170BHP, LPi + Flashlube)