>>9553005The break looks fairly clean, so it should be fairly easy to glue back together. Gorilla Glue 2-part epoxy resin glue should work. Also check out Locktite Plastic Glue. Both can be found at any WM or hardware store. Just be patient and glue together one piece at a time to the neck and let the glue cure for a day between gluing pieces.
As for the knee, the best stuff to free it is RC car shock oil, which can be found wherever hobby grade RC cars are sold. Failing that, some silicone spray, which can be found in any hardware store. In either case, just the apply the shock oil/silicone spray directly into the joint and slowly try to move the knee joint. It should work if you're not a ham hands. Once the joint is moving, leave the doll on a tray with a paper towel under the knee to absorb the liquids leaking out for 3~4 days. Keep moving the knee each day to ensure it doesn't lock up again.
The end result may not look the best, but it saves the doll body and you won't need to spend the time or money hunting down a new Obitsu body when shipping rates & time are currently a nightmare
