Getting your fixed at Best Buy through Geek Squad is a solid choice because they are an Apple Authorized Service Provider , meaning they use genuine parts that won't mess with your warranty.
Best Buy will match Apple’s official repair pricing if you find a different authorized rate. Key Things to Know best buy iphone 6 screen repair cost
If you happen to still have active coverage (rare for this model), the flat fee is just $29 . Getting your fixed at Best Buy through Geek