What Is This Thing?

Welcome to Edition 190 of What Is This Thing? A visual riddle series with one photo and one question: what is this thing? Each edition is a puzzle wrapped in a box, designed to make you scratch your head and wonder. The photo is a clue, the question is the key. It's not about the answer, it's about the journey. So, what is this thing?

Some more items you'd probably like to throw your cash on...