Sony officially removed from the official stores the a6500 and a6300 cameras. They have been on the market since 2016. The a6300 came as bringing 4K video recording to the APS-C sensor camera line and the a6500 was released as a model with image stabilization inside a body like the a6300. Before that we had the a6000 which is still on sale.
The discontinuation of these models is normal for all brands.