Hello...I have 6 bottles of blended Scotch-Whisky at least 30 years old...as far as I know they've been stored and perserved well and never been open.

Here they are...

John Begg
House of Lords 8 years old
Queen Anne
Bell's
King William
Ambassador 12 years old

Does anyone know how to find the value of any of these bottles? Does the product taste improve with time like wine?

Any help would be great...thank you