I wouldn't but if you like the fish than do. For a little bit more money you could order a discount flowerhorn that's better quality.
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For 5 flowerhorn 50 bucks isn't bad. The main thing is you have to like them. If you want something more high quality id pass. If not maybe choose the nicest one and see if he'll part with it instead of taking all 5
Julie Tran has some RDs on sale for like $40, shipping would probably be only like $40-45. She also has lots of fry for like $10-20. http://www.facebook.com/AquaCraze