Answer:
A large oasis in the desert. Come with cash and leave with none.
The more you work, the more I'll eat.You keep me full, I'll keep you neat. 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.
I am longer than a decade and shorter than a millennium
I have long legs crooked thighs little head and no eyes.
I tell people to be careful when handling boxes.