Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX

Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX appeared in 8 auction lots over the last 12 months across the auction houses wsky1 tracks — scarce at auction (a good find when it appears). That is down 33% on the previous year. That puts it in the top 9% by auction activity among the 35,289 bottles wsky1 tracks — most collectable bottles hammer only a handful of times a year.

The latest hammer price for Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX at auction is £90. Across the most recent 24 months of auction data, the median hammer price is £120, with a high of £161 and a low of £75. All prices are in GBP and exclude buyer's premium. Data is aggregated from major auction houses including Scotch Whisky Auctions, Whisky Auctioneer, and Bonhams.

Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX is down 6.5% year-on-year based on monthly median hammer prices. Over the past 6 months it has moved down 5.3%. Past auction performance is not a guarantee of future value.

Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX regularly appears at major Scotch whisky auction houses including Scotch Whisky Auctions (Scotland), Whisky Auctioneer (Scotland), Just Whisky, Whisky Hammer, and Bonhams. The current median hammer price is £120 (excluding buyer's premium). At most major houses, buyer's premium adds 24–28% on top of hammer for the buyer; sellers typically receive the hammer price minus a sales commission of 5–15%.

Over the past 12 months Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX has moved down 6.5%, with a current median hammer price of £120. The bottle has been observed at auction across 168 recorded lots in our database. wsky1 provides hammer-price data for informational purposes only — not investment advice. Whisky is an illiquid alternative asset; secondary-market value depends heavily on bottle condition, fill level, label integrity, and timing.

wsky1 ingests public auction results from major auction houses (via direct scraping of Scotch Whisky Auctions, Whisky Auctioneer, Bonhams, and Whisky Hammer, plus aggregated data from WhiskyHunter). For each bottle, we group hammer prices by year-month and compute the median price per month. The figures shown — latest £90, 24-month median £120 — are derived from this monthly-median methodology. All prices are hammer prices in GBP, excluding buyer's premium.

No. All prices on wsky1 are hammer prices only. Buyer's premium at major Scotch whisky auction houses currently runs at 24–28% on top of the hammer price. A bottle of Foursquare 17 Year Old Isonomy Exceptional Cask Selection Mark XX that hammers at £90 would cost the buyer approximately £113 all-in including buyer's premium.