I would wait until the screen is sufficiently marred before considering replacement. I have seen the parts as low as $95 with shipping for front and back. Apple charges $199 per. I have a few deep scratches from leaving my phone in my cars console drink tray with my keys. Looks like the scratches will eventually lead to flaking because of how obviously brittle the glass is. I just remind myself that it is just a phone. I don't try too hard to avoid scratches.