Magic store

At the corner of my street
I found this magic store
with days and nights and years for sell and lot of things I longing for.
Till today the store was closed.
The door was chained and locked.
But today a man invited me in.
He told me about the price off.

That sales man dressed in black
I asked about the price.
He told me that the only way to buy
is to have a double ace on dice.
You could take everything you want
‘cause your dice will show the way.
You could take everything you ever need
tomorrow or today.

But if I find there dreams for sell
What should I buy?

Tell me, what should I buy?