What I mean is - If you are going to make 20 "just for fun games" then it is worth paying a price if you use this model over and over in each "just for run game". And after a few fun-runs then you might want to make a real game with the model. Than it is really worth paying for. Also I would like to tell you that if some makes a free model for you - the artist owns the model and can still sell or us it. In most places you can't receive ownership(copyright) of a product if you don't provide compensation for it.