I work at a my LFS... they breed in our reef tanks, I can pretty much have them for free. Secondly, I always have people ask me if I want free tanks, filters etc, whatever that they don't use anymore, or would like to get rid of, so I can get lots of goodies that way.
In less than two weeks ive been offered a 75g with two adult oscars (
), and a 65g hex marine setup.