The variation in price for the same bottle across different auctions can be attributed to several factors:
Diverse Bidder Base: Different auctions attract various types of bidders, each with their own valuation of the bottle, which in turn influences the final price.
Geographical Differences: The region in which an auction is held can impact demand, especially if certain Ardbeg releases are scarce or unavailable in specific markets, thus affecting the price.
Auction Timing: The timing of an auction can influence price due to external factors such as market trends or seasonal demand.