I recently came across a mango tree for sale at a local nursery, and it was only $15. The problem is, I already have a Manila mango tree and i don't want another of the same kind. The salesman doesn't know what kind of mango it is. Is there any way to find out what kind of mango it is? Is there a way to tell if it is a red mango, instead of a green mango like a Manila? Any advice would be greatly appreciated.