Although it’s a bitter cage, Curst makes good wines, probably so a bubber can flush out his sorrows. The best of these is heartwine, a slightly sour and heady drink made from razorvine. It sells for 100 gp a bottle and is prized by gourmands in Sigil. The production process is a secret known only to the Cilenei Brothers, two elves from the Prime Material Plane. Both are wizards, so figure the process is magical in nature. Heartwine’s the only useful thing ever made from the cursed weed, short of barricades.
I dream of Beer Head Armies.
Autocard is our friend. [c]Urborg Mindsucker[/c] → Urborg Mindsucker
There's always a glass of Marauder's Mirth, but that's not exactly safe to drink unless you're immune to the mind-erasing effects of the Styx. It's also a cocktail rather than a wine but I doubt her fiendishness would drink it if it wasn't expensive.
There is an inn called 'The Well and Harp' in Sigil that caters to centaurs. They sure know their wine!
Odd question. But does anyone know what the best, most expensive wine in Sigil is? And if it has any game statistics, from any edition, please supply.