I was surprised to get a great burger at the Pacific Gold Club in Brisbane recently.
From their menu
Wagyu Burger: 100% Wagyu beef pattie served on a toasted bun with bacon/ egg/ pineapple/ bacon/ beetroot/ lettuce and tomato with salad and chips $14.50
Yes, $14.50 for a burger is expensive, but with Wagyu, it's money well spent. I got my beef cooked blue and it was just fantastic.