To give you an idea of value I've poked around some 442s in the past year, land of high overinflated prices.
Car 1: a white/blue top 85, documented mileage <100k spent a long time in storage before the past couple on road. Under 10k asking for weeks now. No noticeable body/interior wear, no mods.
Car 2: blue/blue top 86, documented mileage <100k 1 owner. Looked almost new, garage kept. Sold for 9500 a couple weeks back.
Car 3: blue/blue 86 astroroof. Documented mileage just over 100k. Listed below 9k for months. Repainted driver quality with small defects, but presentable with clean interior.
Car 4: blue/blue 87 ttop. North of 100k, runs/drives, good interior, rusty doors and quarter blisters. All original, but shows age.. 3k
So balance that in with the cars that have been for sale for years without a bite at considerably higher prices.