{"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":"179.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0F9WTJ5LW?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_0e9a9324d185&aa_adgroupid=62deea1df01dbb111c420516de768cbb_PBSEP_!!!affid!!!_118045_&aa_creativeid=cdefKbyBuVhlo1lMj2L06QiwwhtmGfMGnratwRiSDoRTl3o_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mainbuyer.com/evidence/products/fosi-audio-gr70-tube-headphone-amp-preamp-authentic-tube-amplification-with-vacuum-5654w-2-6ac7-2-mini-hifi-preamplifier-for-home-audio-3-5mm-6-35mm-jacks-supporting-16-300-b0f9wtj5lw/prices","gtin":null,"id":22512,"model_number":null,"name":"Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini HiFi Preamplifier for Home Audio, 3.5mm & 6.35mm Jacks Supporting 16-300 ohms Imped","product_url":"https://mainbuyer.com/product/fosi-audio-gr70-tube-headphone-amp-preamp-authentic-tube-amplification-with-vacuum-5654w-2-6ac7-2-mini-hifi-preamplifier-for-home-audio-3-5mm-6-35mm-jacks-supporting-16-300-b0f9wtj5lw","urn":"MB-AWIN-GB-B0F9WTJ5LW"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"179.00","historical_low":"179.00","last_observed_at":"2026-11-11T04:11:09+00:00","low_30d":"179.00","low_90d":"179.00","median_price":"179.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:09+00:00"}}