I agree with most of everyone here seeing after the update, i.e. while you had a duty to say it was 3rd party in the ad, the buyer is now being unreasonable in his demand.
I think the cleanest option which eliminates the buyer's warranty argument is give him $ to buy a new HD which itself will carry a 3-5 year warranty (so it will be at least if not longer than his AppleCare coverage for the entire laptop). From your post, it reads like the warranty on the drive he currently has will run out before his AC runs out.
But, he either has to send you the drive he currently has or you agree to deduct the value of the old drive from what you're sending him so he can keep both drives. He paid for 1 drive not 2.
In my case, I initially got shutdown by PayPal, but then I went back to the Genius bar and had them note on their Genius Bar/Apple letterhead that the laptop's AppleCare was not applicable to the installed HD and RAM since they were both 3rd party. The seller had since closed his PayPal account, so PayPal used a collections agency to find him. This was in the 4th month after my purchase, it took another 2 months to get it resolved.
I think the cleanest option which eliminates the buyer's warranty argument is give him $ to buy a new HD which itself will carry a 3-5 year warranty (so it will be at least if not longer than his AppleCare coverage for the entire laptop). From your post, it reads like the warranty on the drive he currently has will run out before his AC runs out.
But, he either has to send you the drive he currently has or you agree to deduct the value of the old drive from what you're sending him so he can keep both drives. He paid for 1 drive not 2.
In my case, I initially got shutdown by PayPal, but then I went back to the Genius bar and had them note on their Genius Bar/Apple letterhead that the laptop's AppleCare was not applicable to the installed HD and RAM since they were both 3rd party. The seller had since closed his PayPal account, so PayPal used a collections agency to find him. This was in the 4th month after my purchase, it took another 2 months to get it resolved.