That maybe only applicable to certain cases or is US-only. I was quoted ~$500 for rMBP 2015 due to swollen battery (which is entirely Apple's fault), from two of their authorized centers.

I was told they assess the extent of damage and charge based on that, but the whole top assembly is changed in any case (glued). For example, if they believe the keyboard was in good condition, you won't get charged for it (and hence the baseline $200).