I know Best Buy has sold some Yamaha keyboards, and they had, it seems, a reasonable price on a Casio PX-110 Bundle, but now it seems they're going all-in, and opening a full-fledged music section in select stores.
Best Buy to open in-store music centers
A retail entity able to leverage the kind of scale BB has is bound to increase competition in the market. From the linked story, they are planning to stock Roland. That they already sell Yamaha and Casio boards suggests to me they might increase the breadth of their offerings there, too.
On first blush, I regard this as a good thing. I'm a little surprised, though, that they are going this route. For some reason, I thought it was hard to make money selling musical instruments. Guess not.