I get a lot PO'd when some little kid tries to play the old "I have personal problems" card. Get it through your thick skull, EVERYONE is dealing with , every single day - some have cancer, or are otherwise sick or dealing with ill relatives, some have kids with terminal or chronic illness, while many have and will lose family members.
Look at the week Nerf has had - I sincerely doubt your's can compare to that, so don't even try, and I don't see him scamming money and defaulting on deals, while acting like a major tool to his buyers.
Unless you're DEAD, buck up and fulfill your responsibilities, either through quick-and-easy refunds or sending the books.