Last September I purchased a 2004 Mercury Sable with 97,000 miles on it. I am the 3rd owner. The original owner put 90,000 miles on it in 18 months (5k a month-whooo).
The first night I had it I changed the oil, of course... I left it in (MC 5w-20 & Wix) for 2000 miles. It was full & clean when I drained it. Why did I drain it? To put ARX in if, of course. Did the clean/rinse with ARX & I just put PP in(103,000 miles)since it priced 2 for 1.
The car runs perfectly, the interior looks new. If you didn't look at the odometer you would think it had 30 to 40k on it.
In buying this car I moved up 8 years (it replaced a 96 Sable with 95k) for about $4000 after selling my car.
Most cars today, if taken reasonable care of will last a couple hundred thousand miles. With excellent care, a lot more.
My theory is many parts on a car wear out in a certain amount of time as well as miles. Rubber-like bushings/grommets, etc tend to dry rot & crack after a certain amount of time causing squeaks/squeals, more so than miles if a car has been driven mostly on the highway.
It's like gambling, if you are willing to take a chance you can save some money. Some people are not comfortable & would rather pay a little more for a car with less miles.
Good luck to you & "WELCOME" to BITOG.