This car has PISA's fastback conversion.
As mentioned, it's most likely based on an 87 coupe with a 2.8 swapped in. (That would be the easiest way to do it.)
It's kind of... "meh" on the face of it, but it definitely is a piece of Fiero history.
To a collector, it's probably worth the asking price (if there's nothing glaringly wrong with the car, itself.)
Otherwise? Kind of a one-off. Seems like replacement parts would likely be nearly impossible to source.