So modern-ish Volvos, I'm a fan.
I currently own a 242, 760 wagon, 850 GLT, and have or had 3x XC90s, a V70, a S70, a S40, and a S80T6 in the immediate family.
My 850 is a '95 so non-turbo GLT. I dailied it from ~'05 to '15, it was relegated to back-up duty for a couple years, and finally put out to pasture. The odometer was broken but I'd guess it was getting close to 300K miles on it.
They're reliable cars if maintained.
Remember it's an interference engine, do the timing belt, and all wearable items while you're at it, tensioner, idler, water pump. It's not an insurmountable job, but probably not something you want to start your first foray into mechanicing with.
The PCV system gets a lot of attention on the internet, sure it's not as easy as popping a new vent valve into the valve cover of a SBC, but it's not like it's that difficult. Yeah the intake manifold has to come off, it's 1/2 a dozen bolts, a gasket, pull the throttle body off. It's a weekend job taking your time, but it's not as though you're doing this annually, maybe once in 150K miles. There are some tips for making it better if you've got a higher mileage engine with a little blow-by, like remove the flame trap from the vent port in the throttle, and run a larger ID hose from the oil separator to the throttle.
The auto transmissions on the 850s can be an issue, they use a "life time" filter, only way to service it is to split the case on the transmission. I added an inline spin on filter and external trans cooler (I also used it to tow a small trailer) and changed fluid maybe 4 times in the 12 years of my 850 driving, more for my peace of mind, than necessity. The car still has the original transmission and it still worked great when I parked it.
I know you're looking at budget cars, and while I'm a Volvo fan, keep in mind that the newest 850 you can find today is 22 years old. They're robust cars if cared for, but they're not impervious to age and wear.
While my leather seats are in decent shape, only some minor bolster wear, I cared for them with leather cleaner and conditioner. I've seen many examples that look like a half dozen rat terriers were locked inside over night.
While the bodies are galvanized and much more resistant to rust than your average domestic or Asian car, that doesn't mean that cross members, fasteners, and electrical connections won't corrode. A little over 3 years of my time dailying my 850 were in the Columbus, OH area. I worked as a Service Advisor at a large car dealer, and had access to free car washes with under body spray, that I made ample use of. My exhaust hangers, and some suspension fasteners still began to corrode.
My old 850 was finally using oil quicker than I could remember to check it, we bought SWMBO's late grandparent's garage queen '05 Grand Marquis, and put the 850 out to pasture.
In short they're good cars, a lot of the issues are way over hyped on the internet, but realize even the newest 850 is now old enough to buy alcohol and hand guns, so expect a lot of age related wear, and deferred maintenance.