He purchased a laptop with one hard drive not two. You two are meant to come to agreement, not have terms dictated to you, he is now being unreasonable and just simply trying his luck.
I would make my point i.e. hard drive exchange - reasonable, split the postage costs....
I never include the hard drive when I have sold a mac due to sensitive information kept on it - AC covers everything else and too be honest the hard drive warranties are as comprehensive as apple care so he really has no issue - if there are further problems with the hdd - the manufacturer should still replace.....
Caveat Emptor
I would make my point i.e. hard drive exchange - reasonable, split the postage costs....
I never include the hard drive when I have sold a mac due to sensitive information kept on it - AC covers everything else and too be honest the hard drive warranties are as comprehensive as apple care so he really has no issue - if there are further problems with the hdd - the manufacturer should still replace.....
Caveat Emptor