buying Intel RealSense Depth Camera D415 or D435

Although the cameras say 'out of stock', they have not actually gone on sale yet and so you have not missed out on buying them.  There will apparently be a pre-order phase before they go on sale, where you can reserve the camera to help make sure that you get it when it is released.  You can be kept up to date on release news by using the 'Notify Me' button on the camera's store listing.  Thank you very much.