The Find N is OPPO's first-gen foldable smartphone, and has attracted a lot of attention in its first market (China) due to its high-end specs and novel form-factor compared to its main Samsung Galaxy Z Fold3 rival. It has been up for limited pre-sale since its December 15, 2021 launch, although some of that event's units have been listed for increased prices compared to retail since then.
https://www.notebookcheck.net/OPPO-s-Find-N-becomes-a-target-for-scalpers-in-China-as-official-stock-of-the-first-gen-foldable-sells-out.586950.0.html