Yes, it is (edit: a minefield I mean), but a rule of thumb can help: the difference between free and $1 is perceived as much bigger than between $1 and $2. It's just how human psychology works. If you decided to set a minimum price, you might as well own it and make it a decent price. Then again if you're already making sales at the current price point, guess it's a good pick. If unsure, you can try a reverse sale later, and see what happens.