I want to use an iPhone 5s without a being activated?

I'm looking into buying an iPhone 5s 32gb Unlocked but I don't want to use it with a Carrier. Could I just purchase a SIM Card off of Amazon and use it with that? Also I really just want to use it like an iPod Touch. Also please don't say like hey don't be retarded you just buy an iPod, well all I have to say is that I want the iPhone 5s A7 Chip which is really cool so that is why. So if anyone can please help me out that would be nice.

If your going to just use it on Wi-Fi there's no need for a sim card

Why don't you just buy an iPod Touch…