We have developed a tool to calculate the value of a Fiero.
It is based on data / statistics and does not involve all aspects needed for a car valuation, but can give an indication of what the actual value could be.

Fiero valuation tool is found here:
https://fierohub.com/valuation/

I checked it out. Thanks for posting. Very interesting. I have an 86GT with 91k in excellent condition. I paid $5500 last year for it and I wondered if I paid too much! I didn't really care though! According to your calculator, it is worth more now. Awesome!

We are quickly moving into a recession now and I believe the prices of items purchased with disposable income will drop significantly. Inflation and the fake so called Green energy plan has taken its toll and resulted in exorbitant gasoline prices, food, home heating oil and restaurant costs. Its putting a large strain on the working class. Prices of Fiero's will undoubtedly decline. If you are not selling this will not affect you but if you are one of the rare buyers, you'll probably get a great deal. At this point its best to ignore all the price guides.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

About the only "Guides" that most pushes are:
NADA for current to very old cars.
KBB for everything ≤ 25 years old.

Both are use by nearly all Used and New Car Dealers to say what is the "book value" for Trade ins, etc. and F any other "book value" or appraisal made by whatever "expert" unless maybe is their "expert."
Both "Guides" have Major Problems but Publishers keep selling the Rags and Dealers still keeps using them on people w/o a clue thinking the "book valuation" must be true.

Plenty of E-bay and others sellers get their "valuation" out of thin air and/or trying to recover $ spend on "upgrades..." Just look at many threads here alone for last 20+ years. They never bothered w/ any "book value" just as a basic starting point.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

Best thing to do is get a car appraised.

The Fiero market is very diverse and based on modifications and types it is best to get a good read on it.

This tool is ball park for stock but to get down to the real numbers.

Also remember this is value not selling price.