my dealer was willing to run the last three Volvos that I purchased through their Certified Car check list for one hour's labor.

I got a two page written report - they can tell you if an ant ever farted in the trunk!

It costs another hour for a compression check.

Once, I had one of their used cars checked, and the next day the salesman offered to pay for half if I would let him read the report. The service department would not let him see a report that I had paid for!
--
'96 855R,'64 PV544 driver, '67 P1800 basket case, '72 Yamaha Rd400, '68 Honda 350-4, '12 XC70, the first 5 are mine, heh, heh, 525,000 miles put on 10 bricks James A Sousa

These models were problematic about driveshaft noises & vibration. Approx $450 to have rebuilt.
The A/C evaporator is a chronic failure.
The " angle drive " attached to the transmission for the all wheel drive is expensive & needs correct type of lubricant.
The driveshaft MIGHT make a clink noise when shifting from Reverse to Drive or vice versa. It may also vibrate on hard acceleration [ felt in the floor ] The center bearing when faulty makes a whirring sound that increases in pitch as accelerating from stop.
Best to pay $100 or so to have a dealer or VOLVO specific independent shop check it over before purchase.