Decanter collector clubs, like the Jim Beam Club, as well as whiskey clubs, like the L.A. Whiskey Society, are good resources for finding out the value of a whiskey decanter. Their websites offer pictures of old whiskey decanters and bottles and give rough value estimates.
Whiskey decanters and bottles range widely in value. Some of the most valuable ones were made in the Western United States between 1860 and 1910 and have sold for as much as $12,000. More common bottles from this era sell from between $100 and $1000. The value of limited-edition decanters issued by whiskey manufacturers depends greatly on how many decanters were produced and for what length of time.