When you say "Home Premium Pack", do you mean the 3-Pack they've offered in the past? Assuming you have a legitimate key, haven't installed it on a bunch of computers (and activated it), you might be able to sell it for what you paid for it, assuming the refund is a no-go. That was a sweet deal.
Make sure the key is valid and not already tied to another machine, though, or you'll have an angry customer on your hands.