Ok heres something to consider ...
when I had an iBook G3, I got a great deal on applecare off of ebay. It worked perfectly whenever I needed anything done. Two years later I wanted to sell the machine and I was not allowed to transfer the warranty. They wanted an official sales receipt. I faxed in the ebay completed auction as it was a contract of sale in my opinion, they did not accept this. I found it ironic that they were willing to service this machine for two years with all their expensive parts and labor but not to transfer it.
I had to make about 15 phone calls to eventually work something out, but they were not happy and I wasted tons of time. If you want to sell the machine before the period is over, I strongly suggest sucking it up and paying retail. I have always just paid retail since for this reason, it was not worth the headache and at one point the buyer was going to send the machine back and request a paypal refund.
So just consider that, they may have changed since this was over 4 years ago and ebay is even more common now, but I really doubt they want to see a receipt that says you paid that much under retail.
