{"item_id":21730,"name":"Black tourmaline core","url":"https://runescapetrader.com/item/21730","unit":"GP","buy_limit":5,"prices":{"instant_buy":{"gp":442664,"observed_at":"2026-09-11T17:35:32Z","age_seconds":1298,"status":"stale"},"instant_sell":{"gp":424611,"observed_at":"2026-09-11T17:52:22Z","age_seconds":288,"status":"fresh"}},"market_data_updated_at":"2026-09-11T17:56:11Z","source":{"name":"OSRS Wiki real-time prices","url":"https://oldschool.runescape.wiki/w/RuneScape:Real-time_Prices"}}