I always drive old beaters that usually have at least 100k or even 200k
when I buy them. In this area, with the high deer population and the ridiculous amount of salt and calcium chloride that the state dumps on the road in the winter, I refuse to spend a lot on a nice vehicle that I would end up getting attached to.
My current beaters are:
2005 Dodge Grand Caravan C/V (cargo van w/ no options except air)
It has 177k and is still mechanically very good. Cold A/C, too. It has some rust starting in the rockers, rear dog legs, and the bottoms of the doors. If I decide to hang on to it for a while, I'm going to weld on new rockers and dog legs and treat the doors as best I can. It is still worth fixing as the undercarriage is still in great shape.
2004 Chevy Silverado regular cab 8ft bed 4.3 v6 auto 2wd

I just bought it at the end of last year, and really have barely driven it. It has 240k and is in great mechanical shape, besides needing a tune up and having a very slow battery drain that needs attention. It even has cold A/C, too. It has had a Jasper reman transmission put in at some point. It has the usual Chebby rust in the rocker panels that has been patched (although somewhat poorly) and over the rear wheels behind the fender flares. The underneath is VERY clean, though.
The highest mileage vehicles I've had:
1997 Ford Aspire
It had 282k when I bought it for $150. It ran like a top, used basically no oil, and shifted great. The body was pretty rusty, though. I made the mistake of paying for and taking possession of the car without getting the title at the same time, and the previous owner kept avoiding me and giving the run around when I'd see him.

So, I bought another cheap Aspire with a good body, low miles, and a bad transmission and combined the two cars. The parts car had 286k when I dismantled it. It even had the factory clutch in it.
1990 Volvo 240 DL wagon
The odometer didn't work when I bought it, and was stuck at 225k. I suspect it had a lot more miles than that on it. I fixed the badly leaking cam seal it had when I bought it, replaced the oil soaked timing belt, and tuned it up. It ran OK and shifted good, but the clutch was getting weak. Then the steering rack started going bad. The steering would stick/not return to center when making a turn.

The check engine light came on, and I couldn't figure out why. The clutch got weaker. The rear part of exhaust fell off. The rear calipers seemed like they were hung up/not engaging. It had various electrical quirks, too. I liked the car, but really didn't feel like fixing everything that was wrong with it, so I unloaded it for $100 MORE than I paid for it.
