At the recent stamp exhibition held in Nanning, China, Australia Post released a set of 5 Souvenir Sheets featuring Beetles with the Exhibition overprint. These were available by mail order from Australia Post direct but have been sold out. They also released 500 sheets each day at the Exhibition and 100 sheets were available on each of the 5 days with a special exhibition cancel with a limit of 1 sheet per customer. These were quickly sold out each day, usually within a few minutes of opening time of 10am. as those attending who had passes were allowed in before opening time and many headed to the Australia Post stand to be in line before the official opening time.
There are most probably less than 5 complete sets of cancelled sheets in existence and the prices asked in eBay
so far have been in the range of A$ 300 per sheet with only a couple of days available. http://www.stampboards.com/viewtopi...f=13&t=73324