This, by way of the Freakonomics blog over at the NY Times on Monday:
Zimbabwe’s currency has been essentially worthless in-country for months. Now the Zimbabwe dollar is officially worth more on eBay, where collectors can snap up a few trillion-dollar notes for less than $25. Technically, a currency exchange would give you 37 million Zimbabwe dollars for every U.S. dollar, but since Zimbabwe’s government recently suspended its currency altogether, you probably shouldn’t bother. They’re worth far more as novelty items.
And indeed, a quick glance at eBay confirms it is true: trade in Zimbabwe dollars appears highly liquid and even potentially profitable. Lucky for FT Alphaville we managed to get our hands on a note:

Related links:
Zimbabwe datapoint du jour – prices are falling – FT Alphaville
“Filling the system full of money is insufficient to threaten a rise in inflation” – FT Alphaville
The Bank of England speaks: “This is not Zimbabwe” – FT Alphaville
