It's the norm in commercial aviation for prices to vary according to order size and timing, delivery slots and whether the buyer is an airline or a leasing company (i.e. Boeing publishes a "sticker price" but its customers don't actually pay it)

In this case, you've got the added complication the aircraft is still a work in progress, and so what's actually negotiated is likely to depend heavily on timing of payments and cancellation clauses.

I am curious about whether the pricing ballpark is in the "new turboprop" or the "operating economics make it cost-effective to replace ancient piston operated aircraft in a relatively short timescale" range though. That could be a big deal for some low-use routes and in markets like Indonesia and the Philippines.