jet packs go for between $200-$400
200 would be the most basic rough kit, probably needs to be trimmed and sanded and assembled
and 400 would be mostly complete whether that means no assembly, less painting etc. etc.
unless you are in a big rush i'd wait on it for a bit, like mentioned above don't skimp on anything you are already willing to paY over a hundred dollars for because you'll just be upgrading and it'd be better to just save and purchase something oyu know you will be happy with
boba maker has a jet pack in progres. if you are interested in kits his stuff is usually awesome quality
-=QuinN!