In last November, John Bull's auction sold an un-issued PRC stamp and it broke the record for most expensive Chinese stamp. The news is reported in Linn's. The stamp sold for $475,000 which is more expensive than the small dollar on red revenue. This stamp is known as "The large whole country is red". And it is first time been offered publicly in Hong Kong. Here is an image of the stamp.
There is an Interasia stamp auction on Jan 31, 2009. It has more of the un-issued stamps. They even have an imprint block of an unissued Mao and Lin stamp. This stamp is known as "The complete victory". The estimate is HK$5,000,000 - $6,000,000. That is US$714,000-$857,000. I think that is a conservative estimate. I think the record for most expensive Chinese stamp will be broken soon.
In the auction, they even have half of stamp estimated at HK$600,000. I mean literally half of stamp.
Here is the acution link.
http://www.interasia-auctions.com/cgi-bin/viewtop.php?sale=9
