Sony Japan has just announced that they have a production issue on the Sony a7S III. So it may take some time before Sony a7S III is delivered. You can pre-order Sony a7S III at Amazon & B&H & Adorama & Focus Camera.
Sony Japan today issued a press release that recently announced Sony a7S III pre-orders has greatly exceed their expectations. This means you may not get your a7S III on time on the release date (Sep 24), so you’d better pre-order ASAP to get a7S III early.