Answer:
who do you think you know but sometimes you don't
Come up and let us go. Go down and here we stay
He stands beside the road. In a purple cap at tattered green cloak. Those who touch him, curse him.
A box without hinges, lock or key, yet golden treasure lies within.
I move without wings, Between silken string, I leave as you find, My substance behind.
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.