GameCube

Index

Listing Price: 90¥
Listing Description: "Nintendo ultra-rare collectible NGC original engineering test controller"
Listing Description (Original): "任天堂超稀有收藏品 NGC原装工程测试手柄"

As the description implies, this was a GameCube controller likely used for engineering testing.

The controller's label (Roughly):

External objects management

Management Number: S-B8520-465

Angular Velocity (CFS8280 Handle)