All bundles

You need to find a time machine or someone that has purchased extra copies. Unfortunately you won't know if the individual has purchased it for only a cent.

http://www.indieroyale.com/ (Just ended, next one starts in a week)

http://www.indiegala.com

http://www.getgamesgo.com/little-big-bunch (Most are not steam keys)

http://www.humblebundle.com (No clue on that one's next start time)

IndieGala - you have 8 days to buy it. You get keys sent to your email and you can't access them thru the site. It's the first bundle they're having and the system for it at the moment is rubbish.

I can't buy indiegala. What's the minimum?

1. If you are buying it to get more coal... Then I hate you.
2. It is pay what you want, but if you put less then 1$ it won't work. xD