If this is your first GTP, it's always recommended to go with US captive born and bred. "Farm bred" labels, if you don't know the origin importer, most likely are just illegally wild caught and imported. With that, you'll more likely than not end up paying more for vet bills than you did for the animal, and especially at such a young age for a GTP, a possibility of the animal not making it in the end.
Experienced breeders might get a farm bred/imported animal to add new genes into their lines or for a rare locality type. But if not for these reasons, or you want a GTP who is healthy, it really isn't worth the effort.
More in-depth info on "farm bred" animals on this site, if we can link externally:
http://moreliaviridis.yuku.com/topic...s-and-Acronyms