"Huh?"

Inigo should know better. Anyone with more than one braincell would know what's about to happen here, would know exactly why Tidus is doing this, phrasing things this way.

But unfortunately Inigo only has one braincell, so he doesn't see it coming at all. Instead he just blinks at Tidus, totally unsure why the other has to confirm it like that.

"Yes, of course! I want to see what it's like before I can know if I even want to trade it away!"