We don’t give estimates as we can’t possibly predict manufacturing delays, shipping delays, and quality control delays. With that said the goal is to not sell out, so it is more than likely ordered, in production, or on the way to us.
The quickest way to know when it is available to purchase for the first time, or back in stock, is to subscribe to stock notification alerts on the product page. This is done by entering your email in the box above the red 'Notify Me' button, then clicking on the 'Notify Me' located on the out of stock product's page. That box will change to a message that says, 'Thanks for signing up for restock notifications!, once submitted successfully.
You'll be notified immediately, when it is available to purchase for the first time, or back in stock.
The amount of people that sign up for back in stock notifications also informs if we need to prioritize lower volume products that may have more demand than we realize, such as different color (non black) variations of existing products.