Not sure how many miles are on your car; that will make a difference in what you need. My '88 daily driver has 297k on it and I think its relatively well maintained and not beaten. Last weekend I replaced both lower outer control arm bushings (shot big time). I took the opportunity to inspect everything else because so much had to be removed. In preparation I ordered the entire set of links and bushings from Autohauz and when all was said and done, I didn't need anything other than the two outer bushings (left and right). Just returned the rest to Autohauz and will use the money toward new shocks and struts. So instead of a full suspension rebuild, my rear suspension (and I have put owned it for 195k of the total mileage and it has been parked outside in NY winters for 10 years) only needed outer bushings. I would agree with the "if it ain't broke don't fix it" mentality.
The front suspension needed ball joints so I replaced them and the control arm bushings at the same time. Just because they were easy, I replaced the sway bar bushings too. Just had an alignment today and the car is like it was when I got it ten years ago.
Have a comprehensive inspection done before doing the job and don't tell your Indy you had planned for the worst.
If all you need is what I replaced, you might be looking at $600-800 with an honest mechanic.