While it is still out of stock at B&H, and overly priced markups on eBay, you may want to hurry on this article. There are a few GH3 camera bodies (normal price) IN STOCK and ready to ship from Amazon (click here)

Panasonic GH3 Camera Body In Stock.

Also you may want to check Samy's as they seem to be getting these regularly found at https://www.samys.com