Antique Side Board

This is approx 7' high by 7feet long  My mother passed this year at 75 and she grew up with it? Dovetale joints.  Beautiful and heavy.  I have no other information.  I need to have it professional cleaned up.  I was just wondering if anyone would know the value?  I remember nimbers around 10k being talked about but don't know if that was based on anything?

Any input would be helpful

Thank you Russ