{"dataset":"MainBuyer UK price observations","market":"GB","market_name":"United Kingdom","methodology":"Each observation is stored only when MainBuyer has a timestamped checked retailer offer. Missing days are not interpolated or invented. Historical low, high and median figures use recorded in-stock observations only.","observations":[{"currency":"GBP","in_stock":true,"observed_at":"2026-11-11T04:11:10+00:00","price":"599.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0FJX4CG4M?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_44600816e61d&aa_adgroupid=b6c54da77da765a2701624943d245142_PBSEP_!!!affid!!!_118045_&aa_creativeid=95eaigTpyfJnsrVfRluapfCzAx7zF9u5Lmy_ayn3E5aaD9Bw_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://www.mainbuyer.com/evidence/products/fosi-audio-i5-open-back-planar-magnetic-headphones-with-97mm-ultra-large-diaphragm-cnc-metal-walnut-wood-audiophile-wired-studio-headphones-for-multi-source-devices-b0fjx4cg4m/prices","gtin":null,"id":22514,"model_number":null,"name":"Fosi Audio i5 Open-Back Planar Magnetic Headphones with 97mm Ultra-Large Diaphragm, CNC Metal & Walnut Wood, Audiophile Wired Studio Headphones for Multi-Source Devices","product_url":"https://www.mainbuyer.com/product/fosi-audio-i5-open-back-planar-magnetic-headphones-with-97mm-ultra-large-diaphragm-cnc-metal-walnut-wood-audiophile-wired-studio-headphones-for-multi-source-devices-b0fjx4cg4m","urn":"MB-AWIN-GB-B0FJX4CG4M"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"599.00","historical_low":"599.00","last_observed_at":"2026-11-11T04:11:10+00:00","low_30d":"599.00","low_90d":"599.00","median_price":"599.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:10+00:00"}}