A vehicle with that kind of mileage the price IMHO is TOO HIGH. I paid $5000 for a 97 with 87,000 miles & a 30 day warranty from the dealer & I feel I paid too much for it. But it is a good truck had some issues that where covered under the warranty but for the last year & half has served us well.
I bought a 98 Jeep Grand Cherokee Limited 5.9 with a 120,000 miles for $3300. Look around you can buy one with less miles for the same or less money.
As for mileage as a retired mechanic about 250,000 miles & they are pretty wore out.