Dough kneading board, homemade bread, rolling pin

Purchased about 8 years ago.
Used for 3 years.
Stored at home since then.

The front is in good condition.
The back has become slightly yellowish overall.
Perhaps this is because the back was exposed while stored?
There is also a stain-like mark in one spot that did not come off even after washing. Please check the images. The front is white with no dirt or scratches.
We will pack as compactly as possible. Thank you for your understanding.

??Size
Approx. 42 cm (height)
Approx. 53 cm (width)