The stuff - OSRS Wiki

The stuff is purchased from Honest Jimmy's House of Stuff with 50 pieces of eight from the Trouble Brewing minigame on Mos Le'Harmless. Access to the minigame and shop requires completion of the Cabin Fever quest. "The stuff" apparently contains some questionable and/or toxic content, as it has been banned by the Cooks' Guild of Varrock. However, it does not actually cause any negative side effects when used in brewing.

Justine's stuff for the Last Shopper Standing - OSRS Wiki

Grud's Herblore Stall. - OSRS Wiki

New feature on OSRS Wiki: it can now automatically check off the music tracks you've unlocked : r/2007scape

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Music - OSRS Wiki

Sigmund the Merchant (shop) - OSRS Wiki

Honest Jimmy's House of Stuff. - OSRS Wiki

Soul Wars Reward Shop - OSRS Wiki

Wesley - OSRS Wiki

Miscellanian General Store - OSRS Wiki

Wesley - OSRS Wiki

OSRS Wiki is adding exact drop tables/rates for all monsters : r/2007scape

oh. : r/2007scape

Miscellanian Food Shop - OSRS Wiki