Amazon has the renewed premium Samsung Galaxy S21 Ultra 5G 128GB Factory Unlocked 6.8" Smartphone with 108MP Main Camera, 2021 model  (Phantom Black, SM-G998UZKAXAA) for $449 with free shipping.

Amazon's "Renewed Premium" status means certified by Samsung to work / look "like new", has a brand new battery, new accessories and includes a 1-year warranty with tech support. 

• Qualcomm Snapdragon 888 Octa-Core 2.84GHz, 12GB RAM, 128GB storage
• 6.8" AMOLED (3200 x 1440), HDR10+, quad rear camera (108MP+10MP+10MP+12MP), 8K@24fps, 4K@30fps/60fps
• 802.11ac/ax, Bluetooth 5.2, fingerprint sensor (display), facial recognition, Android 11