Ebay offers Open-box Apple Watch Ultra 3 49mm GPS + Cellular Smart Watch for $617 (reg $799) with free shipping.

Product Description:
This is an Apple Watch Ultra 3 (49mm), featuring both GPS and Cellular connectivity in a durable Titanium Case. It comes with a Black Ocean Band, perfect for rugged use and aquatic activities. This high-end smartwatch is designed for athletes and adventurers, offering advanced features and long battery life.
Technical Specifications

1. Model: Apple Watch Ultra 3
2. Case Size: 49mm
3. Case Material: Titanium
4. Connectivity: GPS + Cellular
5. Band: Black Ocean Band
6. Water Resistance: Exceptional water resistance suitable for diving (specific rating based on Ultra series standards)