$300 sounds about right, if it is going to be a portable system that can link to the tv and produce near or equal to the current basic Xbox One/PS4 standards.
As far as sales go, I think that will be determined more by how Nintendo markets it. I really hope they delay its release until late summer or early fall because anything soon would be dangerous given the lack of hype or awareness for it or any major software outside of Zelda.







