Answer:
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
What goes through a door but never goes in and never comes out?
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
I help boats park
A large oasis in the desert. Come with cash and leave with none. What am I?
What is always coming but never arrives?