Ask HN: How do you price an indie game?

Hi HN! I'm planning on releasing the game I have been developing in my own spare time for a while....it's still not finished,but I would like to have a general idea how other people approach this problem - how does one price their app for sale? I would like to do a simultaneous Play Store+App Store release, and would like the app to have a free demo version that can be upgraded to full for a fee + a paid full version. But then.....I honestly don't know how to approach the matter of price. Should I go for the lowest possible price or price it at 2/3/4/10+ dollars? I think my question is - is there some good process to follow in order to determine the price, so I could actually arrive at a "researched" number, rather than go with my gut feeling? Any help would be appreciated :-)