Should've had a couple more prepositions in that title.
Reason I didn't mention a price in the title is that it's constantly changing. It's included in the latest Indie Royale Bundle - The Mash Bundle - which is currently at $5.89. I believe this bundle simply rises in price over time, so hop on board if you're interested.
Probably a long shot that anyone who is interested hasn't gotten it by now, but I've just never seen a good sale for the game. It's currently $29.99 on Steam. I finally picked it up with this bundle.
Here are the other games in the bundle. Can't say I've heard of them -
Guns of Icarus Online
for: steam (pc, mac and linux)
Kung Fu Strike: The Warrior's Rise
for: steam (pc)
for: windows, mac, linux, desura
for: steam (pc), windows, desura
Edit: Guess I should include a link!