Here is a sale for Perth Mint 1/2oz and 1oz Silver Koala sets. Perth Mint 1/2oz Silver Koala Set. From 2008 to 2015. 8 Coins. Earlier years are rare and expensive compared to the later years. I wanted to price them all together. My Price: $250 $236 Images are at the bottom. Coins are in very good condition. Please check the pics, I tried to shot as clear as possible. Perth Mint 1oz Silver Koala Set. [SOLD] From 2009 to 2019. 11 Coins. Same as the 1/2oz, earlier years are rare and expensive compared to the later years. I wanted to price them all together. My Price: $570 $530 Coins are in very good condition. Please check the pics, I tried to shot as clear as possible. Postage: $10 Images: