Hats off to Silicon Alley Insider for their continued coverage of the overseas iPhone market.

Last week, Henry Blodget plucked a pseudonymous post from a New York Times comment stream and re-published what may be the smartest analysis to date of what’s driving the extraordinary demand for iPhones overseas, especially in emerging markets (see “Tantrum” here).

Today, Dan Frommer treats us to an informal survey of the going rate for those iPhones once they are unlocked and put up for sale. The results, grabbed from Craigslist or their local equivalents (Molotok, anyone?), are posted at right. For comparison, he notes, Apple (AAPL) sells the 8 GB iPhone for $399 in the U.S. and the 16 GB model for $499. (link)