Months after ending the production of Kinect, Microsoft today announced the end for the Kinect Adapter. With the launch of the Xbox One S, Microsoft removed the proprietary port required by Kinect owners to connect their device to an Xbox. Microsoft offered a free Kinect Adapter to some new Xbox One S users upgrading from the Xbox One during the initial launch of its new console, although the deal soon ended with the launch of the Xbox One X, requiring customers to buy an adapter for $39.

But the Kinect Adapter has been out of stock across multiple retailers for a while. And the obvious reason behind that is the fact that Microsoft has completely stopped manufacturing these adapters. The company confirmed in a statement to Polygon that the production of the Kinect Adapter has been stopped, but the company will continue to invest in “higher fan-requested gaming accessories” going forward. “After careful consideration, we decided to stop manufacturing the Xbox Kinect Adapter to focus attention on launching new, higher fan-requested gaming accessories across Xbox One and Windows 10,” the spokesperson said.

The (almost) non-existent supply of the Kinect Adapter has led to a staggering increase in the prices of the adapter on sites like eBay and Amazon, where sellers are charging more than $100 for the adapter, with some charging up to $300. Kinect owners aren’t happy with Microsoft’s move to kill the adapter, either — the listing for the product on Microsoft’s official store, for example, is being bombarded with 1-star reviews following the announcement.

Kinect was one of the more innovative products Microsoft released over the last decade. While the product may not have been successful, the technology behind it is being used in other Microsoft products such as the HoloLens, and it even inspired groundbreaking Windows features like Windows Hello in Windows 10.