Seems that the Elf on the Shelf only increases in value.  My older grandchildren have had one for years.  Now the next set of grandchildren need one.  Thought I could buy one used for less but couldn't find one for less than a brand-new one in the box.  This is going to be a generational tradition.  When I was a kid (back in the late 40s to the 50s, our mom told us about the elf watching our behavior and reporting back to Santa.  She would see him and point, but before we could turn our heads, he disappeared!  This may be one of the best parental tools EVER.  I'm going to surreptitious place "Elfie" in my daughter's living room tomorrow at her 3 year old's b'day party.  I hope Maddie and her brother BELIEVE just like Grayson and Ava have for over 8 years!