You're right. Selling was the wrong word. I had it right in the subject line. Transfer. But I assure NDK staff, while I may re-reimburse my roommate for what she paid for the ticket to give to my sister, roommate will not (and would not even if she wished, its against her code of ethic) make any sort of profit from transferring her ticket to my sister. It's purely one person having a ticket they won't be using and a different person coming instead, so let person 2 have person 1's ticket instead of letting it go to waste.
Cheers!