Today I dropped my iPhone 6 Plus and saw no signs of damage until later on where a line appear in the glass. The line starts at the bottom of the unit near the home button, and crosses the bottom right corner of the screen. Therefore it isn't particularly visible when using. Due to the iPhone 7 releasing in September I want to sell this phone - however before I do, would it be worth paying Apple $150+ to fix the screen? How much would a crack like the one I have affect its resale value? Any advice would be great.