Everyone outside of Fairphone can only speculate about this.
From my memory, the Fairphone 2 saw two or three permanent price drops, but then again, the FP2 was sold for at least 3.25 years.
I think the Fairphone 3 and Fairphone 3+ have only seen one permanent price drop since the launch in autumn 2019 resp. autumn 2020.
Other than that, you can have a look at the various temporary deals and promotions that have become a frequent pattern by now:
Or have a look here (you’ll easily find such “friends” here in the forum 
):