Finding another 34-inch curved monitor with the same set of features as this Gigabyte in this price range would be tough. The VA panel and 1440p native resolution may turn off some buyers depending on the usage scenario.
https://www.notebookcheck.net/Curved-34-inch-Gigabyte-G34WQC-A-VA-gaming-monitor-on-sale-for-300-USD.612261.0.html
This one goes for 741 USD in my country (Netherlands) would definitely pick it up for 300.