How to downgrade from iOS 7 to iOS 5 on iPhone 5s or iPhone 5?

I want to buy an iPhone 5 or iPhone 5s. But I want to get them on iOS 5 because of a lot of apps being lost on iOS 7. Like YouTube app and stuff. Plus iOS 5 looks better to me. So

I wanted the iPhone 5 since I can still buy it on iOS 5 from the stores. But I lately I've been seeing it set to iOS 6. I thought that I might as well get the iPhone 5S because it's the best iPhone now and it has a color just like black on the iPhone 5. And since it can get 4g lte, it'll be better on speed. Plus a better processor. But it's on iOS 7 and I like iOS 5 better because the apps look more 3 dimensional where the iOS 7 ones look more like android apps and a little cartoonish to

Do any of you know a where I can buy an iPhone 5 on iOS 5 if not, buy it on iOS 6 and downgrade it to iOS 5?

And do you know how to downgrade from iOS 7 to iOS 5?

You won't get them on iOS 5. Thats an older OS and no one even supports that anymore, new apps won't run on that either.

You can't get any of the devices onto IOS 5. The iPhone 5 and 5s were produced with IOS 6 and 7 respectively. Therefore, IOS 5 is completely unsupported on the devices and there's nothing you can do to downgrade it to that firmware.

FYI, the only iPhone model that can currently be on IOS 5 are the iPhone 4, 4s and 3gs.