{"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":"103.55","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B09YNBHR73?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_dc1f725ba0dd&aa_adgroupid=b12efd58d986032d6564aed2511ce55d_PBSEP_!!!affid!!!_118045_&aa_creativeid=2d10WZlvc9UaKupHhr_biP3yTL39JtSTrG3jST1BNWKhoc9c_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/fosi-audio-bt30d-pro-mini-bluetooth-amplifier-hifi-2-1-channel-subwoofer-amp-with-tpa3255-chips-165w-x2-350w-and-bass-treble-controls-for-home-desktop-outdoor-bookshelf-speakers-b09ynbhr73/prices","gtin":null,"id":22477,"model_number":null,"name":"Fosi Audio BT30D Pro Mini Bluetooth Amplifier Hifi, 2.1 Channel Subwoofer Amp, with TPA3255 Chips 165W x2+350W and Bass Treble Controls, for Home Desktop Outdoor Bookshelf Speakers Subwoofer","product_url":"https://mail.mainbuyer.com/product/fosi-audio-bt30d-pro-mini-bluetooth-amplifier-hifi-2-1-channel-subwoofer-amp-with-tpa3255-chips-165w-x2-350w-and-bass-treble-controls-for-home-desktop-outdoor-bookshelf-speakers-b09ynbhr73","urn":"MB-AWIN-GB-B09YNBHR73"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"103.55","historical_low":"103.55","last_observed_at":"2026-11-11T04:11:08+00:00","low_30d":"103.55","low_90d":"103.55","median_price":"103.55","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:08+00:00"}}