{"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":"2026-11-15T04:11:40+00:00","price":"226.10","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0H3P31GK5?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_59dd0e811174&aa_adgroupid=eb53dac4ad913a791d0c0b08e2a749ad_PBSEP_!!!affid!!!_118045_&aa_creativeid=98098h9UfNXJmzfGunV1mkpZdgOLaWhFrKAt2EixbyGtJAM_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/fosi-audio-im4-open-back-iem-earphones-in-ear-monitor-wired-earbuds-md3-magnetic-dac-amp-dongle-portable-headphone-amplifier-with-1-28-display-b0h3p31gk5/prices","gtin":null,"id":22996,"model_number":null,"name":"Fosi Audio IM4 Open-Back IEM Earphones, In Ear Monitor Wired Earbuds, MD3 Magnetic DAC Amp Dongle, Portable Headphone Amplifier with 1.28\" Display,","product_url":"https://mail.mainbuyer.com/product/fosi-audio-im4-open-back-iem-earphones-in-ear-monitor-wired-earbuds-md3-magnetic-dac-amp-dongle-portable-headphone-amplifier-with-1-28-display-b0h3p31gk5","urn":"MB-AWIN-GB-B0H3P31GK5"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"226.10","historical_low":"226.10","last_observed_at":"2026-11-15T04:11:40+00:00","low_30d":"226.10","low_90d":"226.10","median_price":"226.10","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-15T04:11:40+00:00"}}