What is the difference between the various.. species? subspecies? of GTPs? I mean, I know it has to do with the locality- Biak, Aru, Sarong, etc, but what is the actual difference? Also, how does this relate to the price of each type? Im starting to gather info on them, to know as much as possible before I buy them. I found a blue one- literally, BLUE AND WHITE!!!- from a loacal breeder.. Sadly 6,000 is outside my price range. Made me want to figure out a bit more before I make the plunge. Thanks in advance for the info!