According to the history of the liqueur it is imported today to Canada, the UK and a few other places !! It went commercial after 1974,, so as a rare bottle, it would not be considered one,, just that its use is limited to Greek Cypriot areas and it is less likely seen !! Only way you can establish a value is by sales of the same bottle !! Even if it were one of a kind,, there must be more than one person wanting that bottle or it is worth only what a person paid for it !!