Mayans are not bad fish at all. Only downside is that normally when someone is looking to buy a red terror they mean festae and when they get a Mayan they are disappointed, on its own the Mayan is a nice species.
Look specifically for the name festae and even then be sceptical and learn to discriminate between the two yourself. Otherwise nice fish and don't be quick to get rid of it you might be surprised how food they look.