Evidence of the increasing demand for early rare Pandas can be seen in the chart below
Prices of 1982 1oz Pandas have nearly tripled from about $1000 in late 1994 to about $3000 today. The orignal mintage of this coin was 15,971 coins.
Interestingly, the 1982 1/2oz panda, with a lower mintage of only 13,339, has not yet moved up more than 30%, making it a very good value.
Low mintage, early gold 1983 and 1984 pandas are also still at reasonable prices.