Thats probably a midevil or just a red devil... Since you didnt get get it from a reputable source it should be treated as a hybrid... I personally would not pay over $15-$20 at max...
Like already mentioned, if you didn't get it from a reputable vendor or hobbyist, it is probably a Midevil. Price as always depends on the demand in your area. I see fish like that all the time from free to about $15.
Im going to be honest with that fish has a really long face which is why i doubt he has potential for a huge nuchual hump... I'm not saying its not possible but its looking really develish.. Let it settle inn and then post pics..