OnePlus is holding a Spring sale event on its US webstore from April 21 (today) to 27, 2021. It involves a limited-time offer on the 8 Pro, the OEM's 2020 flagship smartphone. It can be had for as little as US$599 during this promotion.
https://www.notebookcheck.net/Grab-a-OnePlus-8-Pro-for-US-599.533627.0.html