Your drum is an L552 model,6.5x14 bronze,made after 1985. It's value can most accurately be calculated by a search of Oz ebay completed auctions.That will give you an accurate picture of the current resale values of your particular drum.Condition,originality ,shipping and location have a great deal to do with it's value.In the US,that drum usually sells for 450-500 used,in good condition,with the buyer,paying shipping costs.
Steve B