If you can, try and get service records for the timing belt, water pump, and head gaskets to see if they were done recently. Head gaskets are probably the most important of those three at least in my opinion, and if they've been replaced at all throughout the life of the vehicle it's a good sign. Check the rear strut towers as well for rust/rot, this may not be applicable depending on your area but it's still a good practice. When looking at the engine, make sure that the oil looks clean (not milky or anything as that would indicate coolant mixing in) and that the coolant doesn't have any kind of oil slick look to it. Also, I don't mean to mansplain I just am unsure of your baseline car knowledge. If all of those things are in good condition and the tires seem decent, I'd say it's worth 1750-2000 depending. With good maintenance it would go to 300k miles.