In regard to your original question....since it is doubtful anyone has experience with the bottle in question the price could only be determined by the willing seller and buyer.
I found that "Black Dee" whiskey is a product line currently marketed by a Bulgarian Distiller...Bonidex....established 1993.
They also sell "Jack Williams Blue Label Whiskey."
Methinks you are being had.......assuming you are unaware of this info.
My guess is this is a faux old whiskey
I like the Rifle Bottle of Black Dee.....Guns & Ammo advert possibility!
This is funny....the product names are all knock offs of famous products...
"John Rider Whiskey"....looks like JW Black
John Regal.....looks like Chivas Regal
Those tricky Bulgarians....
1 litre for 2 Euros...what a deal!