My dealer is willing to put a used car through their certification inspection process for 1 hour's labor.

The two page report can tell you if an ant ever farted in the back seat.

Volvo used to have a copy of the form on their site if you poke around a bit.

When we bought our '95 854 base, I had the car run through the process and the service department would not let the sales department see my report. The salesman called me up and offered to pay for half if I would let him see the report. (This dealer does not fix a used car up until it is sold!) The car needed a rear main seal.

We have driven this car 100k.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 485,000 miles put on 9 bricks