This one is fairly esoteric. Bruichladdich Distillery, an Islay Scotch producer, makes a gin they call "The Botanist" with botanicals gathered in the Highlands. It's distilled in an old and rare still, a Lomond still, and is the only gin made in Islay. It's a decent gin, does have quite the nose to it, and about as esoteric as you can get. Will come in way under your $100, about $40-50, so you can afford to get him another bottle.