Marble Seal "Takagaki" Unused

Marble Seal Takagaki
Received as a souvenir from China, but I have never used it as my surname has changed. (It was reportedly test-stamped once at the store to check the impression.)
It has a weighty feel with a dragon watermark carving, yet its reddish-beige hue makes it suitable for both men and women.

I have set the selling price without knowing the market value. Please let me know your desired price.