You probably mean rod bearings and not rods. You can't tell how much damage is done until you take the caps off of the rods and check the bearings. Have your uncle check out the car. These cars are usually driven hard so I would plan on an engine rebuild if the rest of the car is in as good a shape as you say. You have to check prices in your area. Again your uncle is the best source for info like this. Check edmunds, kelly blue book, nada for what the car is worth. I'd say $2500 is too much if it has engine problems.