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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.
Bettaâs also then have a âsurvivingâ range. Betta fish can just survive in temperatures between 72Â° to 86Â° Fahrenheit (22.22Â° â 30Â° Celsius). If your bettaâs aquarium were to drop below 72Â° or above 86Â° for more than an hour, you will most likely lose you betta fish.