The seller was right in saying that this tambourine comes up infrequently. There were many pieces to this set, all made in the 1960s. Virtually all of the set can be easily found, but not this tambourine. Made by an unknown manufacturer, one of the quick ways to deduce its age is by the imagery. The cute and simplistic design screams, "I was made well past the heyday of the most coveted Halloween designs!" The price for this item was far stronger than I would have forecast, especially considering it wasn't perfect.
Mark B. Ledenbach's vintage Halloween collectibles blog.