The Perth Mint does buy back certain coins from the bullion trading room in The Perth Mint Shop. These include The Perth Mint gold, silver and platinum coins and medallions and other recognised legal tender gold and silver issues, excluding coins in current circulation. However, the coins must meet certain conditions, so it is best to check the buy and sell gold page for more information.
You can check the current prices The Perth Mint will pay for gold, silver and platinum coins on our metals prices page.