Can I just buy an iPhone and use it like an iPod?

Okay so I want to buy an iPhone, but can I just buy the iPhone itself and use it just like an IPod, but not have the monthly paying? It's hard to explain, but that's the best way I could explain it

Probably.

It's a waste of money (you could just get an iPod Touch), but whatever. Yes, you can do this, no one will stop you.

Yeah of course. Get one unlocked

Yes you can, but for the first set up process, you'll need a SIM card or else you can't continue.

Now, it doesn't really make sense if you're just going to use it like an iPod; New iPhones cost $600+.

Sure, but why not just buy a new ipod instead?

Yes.