Back when Google announced the OnHub Smart wireless router, there wasn't much time before the Google Store ran out of stock of the device in both the colors it's offered in, which is blue and black. Amazon wasn't too much different having quickly ran out of stock of the router due to popularity. One thing people can be certain of is that when Google themselves release a product, the first round of devices is usually very sought after and the initial stock doesn't last long. Now that it has been a few weeks since the official announcement and the initial sale of the OnHub, Amazon is now restocking the router for anyone who wanted to get their hands on it but wasn't able to when they first hit online shelves.
Both the black version and the blue version of the router are in stock, although at the time of writing this there is only one black model left from the seller, which may or may not last long due to the high cost of the product. Currently the black model is selling on Amazon for $337.99 which is quite a bit more than the original cost of the router. If you don't have to have the black model you can still pick up the blue model router for the original cost of $199.
For those wondering there are no differences in between the two colors, so this is strictly a difference in appearance and nothing more. nit's worth noting too that the blue model router is shipped from and sold by Amazon themselves, while the black model is being sold by a third party merchant through Amazon's site, so keep that in mind. The OnHub routers not only look great, but they support speeds of up to 1900Mbps, and are built with 13 high-powered antennas to provide more reliable WiFi coverage around the home. It also supports both 2.4GHz and 5GHz frequencies, and uses the standard WiFi 802.11 ac technology. They're also supposed to be fairly easy to set up and manage thanks to the companion app. For those that are looking to grab these, Amazon is also offering 2-year and 3-year protection on the routers for $9.50 and $18.98 respectively.