1988 Camaro IROCZ with 9000 original miles documented 5.7 TPI?
Hard to know. Did you check eBay on what others are asking and what they are sold for? Maybe check hemmings.com?
These are not really "classics" and they probably never will be- I would just pay what any Camaro of that year would bring as if it were a "grandmother" car- offer $5000-