The older car may need things like suspension bushings, motor/trans mounts, heater hoses, and other parts that deteriorate with age, but the car should be much cheaper. For more money, you could get a newer car with airbags ('90-on in the 240) and/or ABS ('91-on in the 240), that will likely have less miles. Basically, it's your choice whether you want to pay now or pay later. If you do a lot of your own work, look for an older car, but if you don't do most of your own work, find a newer car that has the added features. Either way, the engine and trans should last as long as you want to drive the car.
Good luck.
Good luck.