They may be selling them, but I don't think a lot of people are still using them.
Most people that I know that had any of these devices (including me, mines in my closet somewhere), have stopped using them. Not to mention the fact that the merger between XM and sirius messed up many of the channels and functionality.
So, you're saying we're in the short window between when they stopped making them (a few weeks ago?) and when they no longer sell them?