I got my GTP from a guy that breeds his animals for the hobby and not for the money. You can easily pick out these guys on a forum. I paid 325 euros, and I've seen pictures of the parents.....they we're smokin'!!

Oh, don't buy young GTP's from people that say to know the gender. GTP's can be probed from the age of one year! And make sure the snake had some meals before buying.

Good luck!