Pu-erh price update

In January this year I purchased these 3 cakes (san 三 bing 餅)
Weight(s): 357gms. each
Price(s) 300¥ (RMB, yuan 元) each.
Selling price, May 2007 600 ¥ (RMB, yuan 元)
The commemorative Twin Golden Dragon Seal Package.
From the: First Yunnan International Pu'er Tea Expostrade Fair;
September, 22nd. -26th. 2006
Seven Cakes at 150g each.
I purchased two of these presentation sets in December 2006, for 900¥ (RMB, yuan 元) each.
Selling price: May 2007: 3,000¥ (RMB, yuan 元), should have bought more !!!