Want to buy Iphone 4.were can I get it?

I want to get the Iphone 4 but its to expensive… And my dad says if I want I have to buy it w/ my own money… At&T is way to expensive and amazon and ebay are to does anyone know were i can get a good quality Iphone for a cheaper price.
-Thanks

You an either go to an apple store, go on amazon, best buy, or your cell phone company.

You can't because Apple is overpriced. The only cheap iPhone you will find is a broken iPhone.

Iphone 4 is free with a 2 year contract, get it that way.