I'm all for being able to check your retainer status remotely (what has sold or not), but being able to "buy and sell" seems a bit unnecessary. It's not like we'd be able to craft anything with this app. This would also pose somewhat of a conflict of interest seeing as you can do all that remotely, with a PS4/Vita (remote play). I'm sure SE would much rather you fork over the cash for such a luxury.

While we're on the subject, it would also be nice if we could check our retainer sales status via the start menu, in game.