I own this board (see bad

- What kind of board is it?
- Is it rare?
- What is its value today?
I tried to find similar boards on eBay etc. but I could't find any information about it, this is what made me think I might have a little treasure in my basement. The board seems to be untouched, I think it has never been used, there are no scratches or dints.
Thank you for your help.