Depends on what you want.
You want just a "jungle carpet".....you can get one for 75 bucks. You want something nice with a name attached to it (high-lighter, etc).....you're going to spend 250 -500.
Always ask to see pictures of the adults that produced them....this will give you some idea of what they might turn into.
X2 there are cheap jungles out there but we have been careful at selecting which animals we purchase through which breeders. we have gotten some REALLY nice ones from Mystic Reptiles and Phoenix Reptiles. We have full history on lineage with photos of the pairings (parents) and the snakes we have gotten from them have been excellent eaters and in great health. It definately pays to get a nice animal from a great breeder, esp if you plan on breeding yourself. You want nice stock to start out with.
Tikigator Exotics & Chondro Collective (find us on facebook!)