Originally Posted by guenthar 
If I was making games (someday I will) I would put it out for the price I decide it's worth for about a year or two, then discount it for another year or 2, and after that put it out for free. I think within a year or 2 you should have your main audience, then after about 3 to 4 years you would have the people that were interested but were not sure, and then after that since it would be free you might get people that are curious that will download it and then maybe get new customers.
You might want to adjust that plan if you plan on going indie. Their strength is in having a long tail. Even more than 4 years long

or at least that's what I've read. No idea if it's true or not.