{"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":"2026-11-11T04:11:08+00:00","price":"109.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B09DXZ7Z82?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_c3b11f973f72&aa_adgroupid=872a9f66bb3a30e8fb2fda3445fb4713_PBSEP_!!!affid!!!_118045_&aa_creativeid=6849cNm2Qn7IU7LOWAsNKnowLxClftrOVg1lMr_bk8IyngQo_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0-home-audio-stereo-2-channel-amplifier-receiver-mini-hi-fi-class-d-upgraded-integrated-amp-for-speakers-with-bass-treble-control-b09dxz7z82/prices","gtin":null,"id":22460,"model_number":null,"name":"Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control","product_url":"https://mail.mainbuyer.com/product/fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0-home-audio-stereo-2-channel-amplifier-receiver-mini-hi-fi-class-d-upgraded-integrated-amp-for-speakers-with-bass-treble-control-b09dxz7z82","urn":"MB-AWIN-GB-B09DXZ7Z82"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"109.00","historical_low":"109.00","last_observed_at":"2026-11-11T04:11:08+00:00","low_30d":"109.00","low_90d":"109.00","median_price":"109.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:08+00:00"}}