Whisky North

how do I find what a whiskey decanter sells for Certain?
Specifically Lord Calvert "North American Woodduck" That is second in a series. I checked ebay and That There wasn't on one specific. My dad is trying to find out by HAD I have not much luck on the internet search. Please help! Should I be looking on A Certain antique auction or website?
Check Either the kovels website, www.kovels.com or one of Their guides at the bookstore. I found my Jeanie Jim Beam bottle using Their guides.
Harling with Fly Rod on River Tay – Bernard Cronshaw enjoying a Lazy AM whisky- North Wales Fly Fishing school