{"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":"2026-11-11T04:11:09+00:00","price":"113.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0DLKRCDS8?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_bcfad3347b82&aa_adgroupid=30379e70bc903168520d4c740ed23aaa_PBSEP_!!!affid!!!_118045_&aa_creativeid=b2a1kbiFcd9mskLFVkbnr32PJ8yivr5nebVL6WfW32GT40I_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mainbuyer.com/evidence/products/fosi-audio-gr40-tube-preamplifier-with-dac-stereo-headphone-amplifier-3-5mm-home-audio-for-active-speakers-headphones-digital-to-analog-audio-converter-preamp-with-bluetooth-and-b0dlkrcds8/prices","gtin":null,"id":22498,"model_number":null,"name":"Fosi Audio GR40 Tube Preamplifier with DAC, Stereo Headphone Amplifier 3.5mm Home Audio for Active Speakers/Headphones, Digital to Analog Audio Converter Preamp with Bluetooth and USB/OPT/CO","product_url":"https://mainbuyer.com/product/fosi-audio-gr40-tube-preamplifier-with-dac-stereo-headphone-amplifier-3-5mm-home-audio-for-active-speakers-headphones-digital-to-analog-audio-converter-preamp-with-bluetooth-and-b0dlkrcds8","urn":"MB-AWIN-GB-B0DLKRCDS8"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"113.00","historical_low":"113.00","last_observed_at":"2026-11-11T04:11:09+00:00","low_30d":"113.00","low_90d":"113.00","median_price":"113.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:09+00:00"}}