Here’s a polished and easy-to-read version of your update:

Currently, Seeker mobile phones on Xianyu that haven’t been activated have dropped to a floor price of 1,900 RMB. After Christmas, the price is expected to fall further.

The past few days have been slow, just browsing Backpack to use up the 1,000U handling fee qualification.

Once the Backpack event ends, the Seeker phone may lose most of its value, so anyone planning to sell should act quickly.

For reference, the CoralPhone currently sells for around ¥700 for unopened units, even though it originally cost $599–699 each.

I can also make a short, punchy version for social media/Telegram emphasizing the “sell before it drops more” urgency. Do you want me to do that?