The creator of the [previously-linked][prev] (and awesome) lo-fi fantasy tile set [has opened a store for making / selling licenses for new ones][link]. I applaud this. Make money on your art.
[link]: http://oryxdesignlab.com/sprites/ “Sprites — Oryx Design Lab”
[prev]: http://extrafuture.com/2009/11/23/tigsource-user-oryxs-8-bit-fantasy-graphics-tiles/ “Oryx’s 8-bit fantasy tiles”