Idiot parts are expensive. Crash your car and need a new bumper, you pay idiot tax. Buy used body parts and they'll cost the same as any other car. Some parts were dealer only like rear drums but slowly aftermarket is coming around. There's still no aftermarket stock replacement front struts that I've seen unless you order some from overseas or get coil overs.
I have a feeling a door for a Maserati might cost more than a Mirage.