Answer:
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
Feed me and I live, give me drink and I die.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.