Yes, the fees are not outgoing but incoming to Australia (I am not saying that this fully totals the mark up you note) but that price is in $A currently the $A is around 79c US (but you never actually get that on an exchange) so the $241.50 (@79cUS) works out at @$193US. When that knife enters Australia the importer is liable for the shipping costs to get it here, import duties (that in my experience woks out at around 7% plus the Customs broker charges if you use one or a processing fee by Aus Post or the carrier if you don't - these are calculated on the price of the good INCLUDING the shipping as I recall but I may not be 100% on that) and needs to apply 10%GST. They are not fees added on for you buying from the US they are the costs to have the knife "on the shelves" here. They they have to carry those costs (ie paid up front - except the GST) until the knife sells...
And yes I generally think CEK is over priced and this is why I generally buy from the US, during the regulation period here I did buy a few they had in stock simply because they were not longer able to be imported. That said if you thought it so overpriced why buy it in the first place and then complain ? Would the answer simply have been not to buy it ?
Where did you find the same blade for sale for $50 ? Just to compare apples to apples.
Do understand we get it in the butt down here on the price of most all imported goods.