Fair price for a 34 inch ultrawide. Has been cheaper previously https://www.ozbargain.com.au/node/611219 but you will be waiting a while for a repeat. I'd rate this above the xiaomi 34 ultrawide as it has 1ms response time and inbuilt speakers which are handy.
15 or 17% code (PM1517) depending on if you have ebay plus. You can sign up to a monthly membership for an extra $9 in savings https://www.ozbargain.com.au/node/623195 and f cost of $580.17 which can be brought down further with discounted GCs.
Gigabyte G34WQC 34" 144Hz Ultra-Wide QHD 1ms FreeSync Curved Gaming Monitor
Panel Type: VA
Colour Saturation: 90% DCI-P3 / 120% sRGB
Native Resolution: UWQHD (3440 x 1440)
Brightness: 350 cd/m2
Contrast Ratio: 3000:1 (typ), 12M:1 (DCR)
Response Time: 1ms (MPRT)
Ports: 2x HDMI 2.0, 2x DisplayPort 1.4
Speakers: 2W x 2
Adjustability: Tilt & Height
VESA Support: 100x100mm