Answer:
I run smoother than any rhyme, I love to fall but cannot climb. What am I?
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.
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
I ask no questions but receive a lot of answers. What am I?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.