The Nikon’s AF-S NIKKOR 500mm f/5.6E PF ED VR Lens (Pre-order at Amazon, B&H Photo Video, Adorama, Focus Camera) is one of the best selling lenses from Nikon. After it was announced in late August, 2018, this lens is still out of stock everywhere. You can take a look at in stock tracker of this lens.
The Nikon AF-S NIKKOR 500mm f/5.6E PF ED VR Lens is a very popular lens. It has out of stock for weeks since this lens was released. According to NR, a new batch of this lens now shipping in US these days. But it is still out of stock everywhere at Amazon, B&H Photo Video, Adorama, Focus Camera. You can track availability of this lens here.