Iphone 5 screen replacement

So I currently dropped my iphone 5 and it cracked! However it's not a huge crack, and sometimes you don't notice it. But nothing else is cracked besides the screen. I don't believe the LCD screen or anything of sort is cracked. I don't have AppleCare. I know the price for fixing this is very expensive, and I just don't have 200-300 dollars to spend on this. So is there a d-I-y kit for only the screen, or can companies replace just the screen, and not everything else to make it more affordable. The reason being, is because I would like to sell the phone back for some money when the contracts up, so I don't want any problems!

You can just replace the glass lens, but it needs professional installation. You'd better ask help from expert.