I need a little advice on the best way to sell an extra applecare agreement I have for a MacBook. To make a long story short, my gf purchased applecare for her Macbook just before her 1 year warranty expired. Unfortunately, when I tried to register the agreement, the system told me that her computer was already covered by an agreement! It turned out that she purchased applecare with her computer and had forgotten! Now we have an unused agreement that has been opened. Can anyone suggest the best way to sell it? It was purchased with a university discount and can be sold for less than $249. Thanks in advance for your suggestions!