No, not really a fair trade bro...lol...you sold your LARGER Crenicichla sp. 'xingu I' and your regani for four juv. Crenicichla sp. 'xingu I'? You shoulda just waited and got them, or just traded ur regani. Oh well, its over wit now. Good luck wit them. Watch for aggression, once they hit about 5" they are gonna start not likin each other very much...lol. Or other fish for that matter. Crenicichla sp. 'xingu I' are notorious for their aggression and intolerance of other tankmates. Some are more mild than others, but for the most part they are anal.