It's purpose once in secondary hands was not the point of me noting it's value (and purpose) to primary Retailers. In terms of retailers, advent calendars expire tomorrow... just like Christmas items are half price on boxing day, and how regular calendars are discounted in the final weeks of the year, and are often really cheap once you get into January. It's purpose is what determines their retail price, not what might be done by a small number of individuals after the items are purchased.