I just bought this huge Chinese 12 oz silver coin: It's so huge that the current Aussie circulating coins can fit on the coin easily: Pretty neat. Haven't saw one for sale for a while and this went pretty cheap in my opinion.
Large Chinese silver coins are very popular today. The latest ask price in China for your 1989 is higher than the eBay figure. Best wishes, Peter Anthony Panda Pricepedia – Coin Prices of China http://www.pandacollector.com/pricepedia.html