{"item_id":13159,"name":"Book of Darkness page set","url":"https://runescapetrader.com/item/13159","unit":"GP","buy_limit":5,"prices":{"instant_buy":{"gp":39999,"observed_at":"2026-09-11T21:23:01Z","age_seconds":1495,"status":"stale"},"instant_sell":{"gp":37105,"observed_at":"2026-09-11T21:15:15Z","age_seconds":1961,"status":"stale"}},"market_data_updated_at":"2026-09-11T21:47:11Z","source":{"name":"OSRS Wiki real-time prices","url":"https://oldschool.runescape.wiki/w/RuneScape:Real-time_Prices"}}