How much to replace iphone 5 screen?

How much to replace iphone 5 screen? Just got it. Something under $140 would be nice to find if thats possible. If not what about a kit? How challening would that be? Anything would be appreciated. Or anything about iphone 5 for thqat matter accessories etc.

What model of iPhone should I get?

Hi iv been thinking about getting an hour phone but because there's so many different models its hard to pick and also is it still OK to get the older versions will they still be useable even after support for them ends, can you help me out?