Looks like it's a big CK perfume sale on Amazon. Perfect timing if you want your perfume/s to be delivered at home.

There are some more CK perfume options (men and women) on sale as per the first comment (and as below). Thanks @Qmar and @ASHGOON!

Calvin Klein Eternity Eau de Toilette for Men, 100ml $18.47

Calvin Klein Eau de Toilette for Men, 100ml $19.49

Calvin Klein Beauty Eau de Parfum for Women, 100ml $25.35

Calvin Klein Euphoria Eau de Parfum for Women, 100ml $32.49

Calvin Klein CK One Gold Eau de Toilette for Women, 100ml $19.79

Calvin Klein CK Be Eau de Toilette for Women, 200ml $21.44 -> This looks like a pricing error as 200ml is cheaper than 100ml.