Dell 27 4K UHD Monitor - S2721QS 4K 3840 x 2160 at 60 Hz AMD FreeSync HDMI for $339 delivered. Not the cheapest its been but still a very good price.
Cheapest price since the 21/06/2021
eBay price is $423.75 (22% off), then add 20% off coupon code PDLTW20 to bring it down to $339.00
Has DisplayPort and better contrast ratio (1300:1) than S2722QC (1000:1).
Device Type LED-backlit LCD monitor - 27"
Adaptive-Sync Technology AMD FreeSync
Panel Type IPS
Aspect Ratio 16:9
Native Resolution 4K 3840 x 2160 at 60 Hz
Pixel Pitch 0.1554 mm
Brightness 350 cd/m²
Contrast Ratio 1300:1
Response Time 4 ms (gray-to-gray extreme)
Colour Support 1.07 billion colours
Input Connectors 2xHDMI, DisplayPort
Display Position Adjustments Height, pivot (rotation), swivel, tilt
Screen Coating Anti-glare 3H hardness
Dimensions (WxDxH) - with stand 61.16 cm x 17.47 cm x 40.01 cm
Compliant Standards DisplayPort 1.2
Bundled Services 3-Year Advanced Exchange Service and Premium Panel Exchange
was a thread on this 2 days ago
https://www.ozbargain.com.au/node/652479