try to stay below 100,000. if u can afford it find one around 50,000. and if they kept good care of it, specially if u are buying a used one. just grill them, nicely.
example:
mileage?
u change the oil often? does it leak oil?
have u needed to make any serious repairs?
are u the original owner?
what is the bottom line price?
is there any rust?
have the tires been replaced?
stuff like that...
if u have some minor work done and the the oil changed and it will last another 100,000 if u take care of it. if u have money left over just take it to a shop, not a dealer, but a reliable shop, and just have him look at it, for you, and if need be spend some money.
but I got mine from a pastor, original owner, had his dog in it, but no big deal. if you hold out somethin good will show up.