I would love to say the Bazaar from Skyward Sword, as every shop was conveniently located in one central area, but... well, the shopkeepers talk way too damn much, slowing down the pace of the shopping. It takes too long to get out of that place during a shopping spree, which is something that shouldn't be an issue. But, then again, there aren't any other shops in Zelda worth a damn, as rupees are either pointless or used poorly (sometimes both). Sooooooooooo... hmm...
You know what, I'm gonna have to say "no response" on this one. :/