Aaah, I haven't worked in marketing but I will tell you this. Your reasoning is flawed, only Deka knows what they should charge, but it has to be in proportion to complexity and time invested into the module.
Quality and complexity wins over popular model in my opinion. Also your unknown module/maker point is not a good one. If it is bad it will sell badly 80 or 40 doesn't matter, word will spread quickly and there will be YouTube reviews etc. As for JF-17 not being as popular as F-16, true it's not iconic, but it's not like we sim pilots have hundreds of modules to choose from. This will be the most modern we have in the game.
But here's some good bussiness for you. If they charge 40-50 for it, they have to sell 2x to make the same or a little bit more than one for 80. That means they can sell almost 50% less copies for the same amount of profit and still have potential to make more when and if they drop to a lower pricepoint. If they start at a lower pricepoint they will saturate the market faster, faster profit but less gain and 80 is not an unreasonable price, many other modules have sold for that price and from what I have seen in a far less completed state than this one is, makes sense right.