I recently got a 1985 Fiero Notchback with the Duke in it, and I've been enjoying it (As much as I could with it sitting in my back yard). I know next to nothing about Fieros, and I'm only just getting into really working on cars. I've never really touched a car with the intent on working on it, so I guess my Fiero will be a little bit of a learner car, both for driving and for working on it.
The previous owner sold it mainly because it kept pulling to the left after a while. It's not a hard pull, but if you let go of the wheel for more than a second it's going to put you into a tree. The steering wheel isn't perfectly straight when driving in a straight line. I suspect (hopefully) it's just an alignment issue, but I might check the steering rack just in case. It's also been sitting for a while with the previous owners, but it's been started up periodically for moving. New coolant, oil, and possibly tires (Though they look fine, no cracking or any visible damage, but regardless I'll be getting new tires by the end of the summer hopefully) are going to be on the list. I can't check the mileage at the moment.
Other quality-of-life fixes like fixing the sagging door on the driver side, getting a new lock for the trunk, getting a new radio, and a fresh clear coat will come after all of the necessities are taken care of. I might also modify it farther into the future. If you want me to go into more details about that, just ask.
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[Noob Alert!]
Owner of a 1985 Pontiac Fiero 2m4 Notchback. :)