{"item_id":10129,"name":"Barb-tail harpoon","url":"https://runescapetrader.com/item/10129","unit":"GP","buy_limit":40,"prices":{"instant_buy":{"gp":364,"observed_at":"2026-09-11T17:52:10Z","age_seconds":236,"status":"fresh"},"instant_sell":{"gp":350,"observed_at":"2026-09-11T17:39:00Z","age_seconds":1026,"status":"stale"}},"market_data_updated_at":"2026-09-11T17:55:11Z","source":{"name":"OSRS Wiki real-time prices","url":"https://oldschool.runescape.wiki/w/RuneScape:Real-time_Prices"}}