Overnight, the shop windows were full again.
On 20 June 1948, the Deutsche Mark replaced the Reichsmark in the western zones. Every citizen received 40 DM in cash; savings were ultimately converted at about 100 to 6.5. Because traders had held back goods waiting for the new money, products suddenly filled the shelves the next morning. The Soviet Union responded with the Berlin Blockade.
Useful: When money is worthless, goods don't disappear; they wait.
Source: de.wikipedia.org