The Manual writes an article about the 5 Most Expensive Rums in the Planet.
#5 - NEW GROVE DOUBLE CASK MOSCATEL FINISH RUM – $95
"You might not think of the island of Mauritius when you think of great rum regions (though you may think of the dodo, the famously not-so-bright and very much extinct flightless bird once native to the land), but this tiny republic, situated in the Indian Ocean east of Madagascar, produces some world-class liquor. New Grove has been producing rum since 1838, and they offer more than a dozen spirits, including affordable spiced rums, unique liqueurs made with rum and ingredients like honey, vanilla, or coffee, and their line of pricier, rarer rums like the Double Cask Moscatel Finish Rum, which is partially aged in wine barrels."
#2 - TROIS RIVIÈRES MILLÉSIME 1980 EN CARAFE BACCARAT – $2,620
"This rum was distilled in Martinique in 1980 and has been aged for almost four decades since, making perfect use of the island’s terroir, including rich volcanic soil and plenty of sun and rain. The liquor releases a powerful bouquet of ripe fruit, caramel, and coffee, with a flavor adding in pepper and a faint anise taste in the long, gentle finish. Bottles are priced in pounds (one sells for £2,000) so the price in U.S. dollars will fluctuate with the exchange rate. If you don’t want to spend about $2,620 but you still want a great rum from Martinique, try a bottle of Trois Rivières Rhum Ambré (Gold Rum), which has many of the same notes but costs just $45."