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Best Answer: Usually common Betta's are very cheap. Ranging from $2.00 to $7.00, but they're are two very expensive breeds. The Western Blue devil is around $600.00 and the Marine Betta is about $70.00.
With the right environment and a good diet, betta fish generally live two to three years, but some have been known to live as long as five years. Betta fish that live in the wild eat live food, mostly bugs.