Potions are burst tools bought in stacks before raid nights, and the weekly reset cycle shows up directly in their price charts.
Potions (Consumable)
Auction-house prices and price history for Potions in WoW Forever.
103 items in Consumables › Potions are currently auctionable in WoW Forever.
Prices refresh as beta players scan from players running the Booty Bay Broker companion, so a ruleset nobody has scanned yet carries no prices at all rather than stale ones.
Potions listings link to price-history pages with per-realm buyout, average, and median data for WoW Forever.