The other call was less GYERelevant, but was on the economics of a used book reseller on Amazon. This company does $50m in sales a year on Amazon. For those 1 cent books, + $3.99 shipping, they make 7 cents per book. They buy their books for 10 cents a pound from Goodwill type places and libraries - sight unseen. Avg a pound per book. Only 12% of the books they buy are in good enough shape to sell. So really they are paying about 83 cents per sellable book. They send the other 88% to pulp mill for recycling for a small fee. The sellable books, they put on Amazon for $0.01, but Amazon makes them charge $3.99 shipping, so sell it for $4.00 total. Amazon takes 15% of the book cost (so nothing), but 30% of the shipping fees, so Amazon gets $1.20. They spend $1.90 in shipping on average per book. So they make $4.00 - $0.83 - $1.20 - $1.90 = 7 cents per book. Of course some titles they sell for $0.99 or $1.99, so they generate most of the profit there, but the vast majority are the $0.01 books.