$400 thats cheap. Take a spare battery and some fuel to get it started ?
biggest thing iv'e seen go wrong is just worn out pitman arm and idler arm in the steering other than that i think they handle pretty good.
pretty solid car so basic but like any 30 odd year old car maintenance should be be done to bring it up to a maintainable standard. Such as all drive line oils,air/oil/fuel filters,coolant,brake fluids and possible master and wheel cylinders might need to be replaced, usually found leaking after changing the brake fluid LOL.
then the shopping list might increase to new radaitor, water pump, hoses, fan belt, few globes to keep the police from sussing you out and heck maybe even tyre's.
only my 2 cents worth but its what id be looking at and doing once iv'e bought the car.