Since it is old, there are some scratches and dirt.
There is nothing big and noticeable.
Please check the photo for details.

GunCon 2 and the game have been confirmed to work
There is no outer box or manual for GunCon 2.
accessories
GunCon 2 2 Black
Time Crisis 2 (NTSC-J) Japanese
Vampire Night (NTSC-J) Japanese

The game is in Japanese, so you need a Japanese PlayStation2.
The gun controller is only compatible with old and large CRTs and will not work with modern flat screen TVs.