Greed will get you into wierd situations

This is my (music in the background) Twilight Zone moment of the day.  You see, the greedy b* that I am I not only have Amazon sell my books but I am always the lowest price secondary seller of my own books in that section of Amazon.  I'll give you a sec to get your mind around that.  Ready?  Today I got a notice from Amazon that one of my "used/new" books had sold.  When I pulled up the address to mail the book...it was a friend right here in town.  Question: Should I show up on her doorstep tomorrow, book in hand?