Is the Lancia Stratos rare?

Excuse me, but I'm curious to know - is the Lancia Stratos considered a rare automobile? From what I've gathered, it was a limited-production sports car, so I'm wondering if its scarcity adds to its collectibility and value in the automotive market. Additionally, are there any specific models or years of the Lancia Stratos that are considered even more elusive than others? Thank you for your insight.