@Oillover , I get what you are saying. the 1gen s60s are one of my favorite vehicles, but one can’t buy a 150k mile sample and not expect to put some money into it. I’ve seen the 1gen models with over 300k running on original seals as a daily driver with no issues, so they can go the distance if cared for. Otoh, I’ve seen miserable samples with chronic tree-light dashboards and the dreaded “reduced engine power” warning somehow still getting owners to work, with torn seats and balding tires.
the pcv flame trap is temperamental. The best plan for that is synthetic oil only, and if its still working, do that. You can do “the glove test” to get an idea of where it’s at. I used synthetic as well as half a can of seafoam in the oil and recovered one that i suspect was close to clogging. Bandaid in a bottle helped in that case, over a couple of years, several oil changes, and miles. (15-20k?).
shift flare in the 1-2 shift on the non-turbo cars is pretty common. My second one had it, but resolved after 2 changes with amsoil and an inline magnetic filter, over 15k miles.
2 of mine started developing vacuum leaks around 150k. The vacuum system is pretty simple in these cars. An under hood line fixed one, and the other was an erratic test pump, so I left it alone.
ABS modules can be a failure point with good aftermarket rebuild support. I never lost one, but did lose a steering angle sensor, which then confused the “steering” in the HID headlamps in one. There’s a cooling fan for the ecu. Some last forever, others start failing about now.
all of mine were purchased in the 100-160k miles range. All, once fixed up, we’re great. My daughter still has my 05, around 180k on it. The neighbor’s kid has another one of mine, about the same mileage and he says it’s been trouble free since they bought it. But, I definitely had to figure out what they needed and intentionally address the issues.
even if they weren’t Volvos, there’s no such thing as a cheap 150k mile car.
i will say, since your folks I think you said are up north? with the standard wheels and tires, not the wider ones on the turbo cars, they are outstanding fwd vehicles in the snow. The suspensions handle frozen slush/rocks incredibly well, they are well-balanced, and about the most sure-footed fwd I’ve ever driven in the snow.