Apple Ipad retina display

Apple can replace the iPad (the whole iPad is replaced, it's not repaired). You don't say what country that you are in, but in the US it's $299 (from here), here in the UK it's £249 (from here) - both prices excluding shipping if required. You might be able to get it replaced cheaper elsewhere, but if it's not an authorised repairer you will void any remaining warranty.

In that case it's $299, and if you are near to an Apple store you could try making a Genius Bar appointment at it : http://www.apple.com/retail/geniusbar/