I have no idea, I've only just started buying beans again... Was a bit worried when I was almost at the bottom of my bag of beans after just a week... I may actually try a bag of Segafredo decaf and see how I get on, us immigrants don't like spending a lot of money on the essentials in life... 😁
Postage costs are a lot of that extra cost tho, right? I always found Australia to have cheaper and much better quality coffee beans than the U.K.
You could try also Red Bean in Melbourne who are awesome. http://redbeancoffee.com.au/shop/