Solid deal on the top of the range Sodastream. Next cheapest is $199.95 @ Appliances Online
Black model also available: https://www.myer.com.au/p/source-power-silver-black-metal-ma...
Same offer is on Myer's eBay if you prefer.
If you've been considering a Sodastream or have one of the hand-pumped model I highly recommend grabbing a powered one as it pumps for you and intelligently carbonates eliminating the spillover mess from accidental overpumping.
Worth noting the Sodastream Spirit One Touch is identical in function in a less premium plastic housing, currently $139 (RRP $149) at Appliances Online https://www.appliancesonline.com.au/product/sodastream-10118... (out-of-stock for some regions but still available for preorder)
If you're really into your fizz, slash your ongoing carbonation costs by 4/5ths by ditching the proprietary CO2 canisters: grab a 2.6kg refillable tank from Kegland and this hose adapter for a combined cost of ~$120 shipped and you're laughing.