* Condition: Well-preserved, low-mileage examples are much rarer than those that have seen heavy use or have been neglected. Rust is a significant concern for Fieros, especially those in areas with harsh winters.
* Options: Specific options beyond the GT trim and T-tops (like color combinations, interiors etc.) will affect rarity. Certain colors might be more uncommon than others.
* Modifications: Original, unmodified examples are generally more valuable and considered rarer than heavily modified ones.
While a 1988 Fiero GT with T-tops isn't considered a "collectible" in the same vein as some muscle cars, a meticulously maintained, low-mileage example in good condition could certainly be considered a relatively rare and desirable find among Fieros. Its rarity lies more in its specific condition and originality than just the model year and options.
