{"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":"79.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0B5ZR9GFJ?maas=maas_adg_api_584955703333686768_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBdd5e46c7ec568c9a30ee9a425b4054a9_2e969cec72b2&aa_adgroupid=8cd514eedde4683f7835406e591c68d2_PBSEP_!!!affid!!!_118045_&aa_creativeid=ba5dcl387dTYjEQxjrP_aNGYEBL4XqhvBUypwkcLlGMoW_aEA_c"}],"product":{"brand":"Fosi Audio-UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/fosi-audio-ds1-portable-dac-headphone-amplifier-with-es9038q2m-chip-supports-pcm-32-bit-768khz-dsd512-3-5mm-4-4mm-outputs-for-hi-fi-audio-usb-dac-amp-for-headphones-b0b5zr9gfj/prices","gtin":null,"id":22478,"model_number":null,"name":"Fosi Audio DS1 Portable DAC Headphone Amplifier with ES9038Q2M Chip, Supports PCM 32-bit/768kHz & DSD512, 3.5mm & 4.4mm Outputs for Hi-Fi Audio, USB DAC Amp for Headphones","product_url":"https://mail.mainbuyer.com/product/fosi-audio-ds1-portable-dac-headphone-amplifier-with-es9038q2m-chip-supports-pcm-32-bit-768khz-dsd512-3-5mm-4-4mm-outputs-for-hi-fi-audio-usb-dac-amp-for-headphones-b0b5zr9gfj","urn":"MB-AWIN-GB-B0B5ZR9GFJ"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"79.00","historical_low":"79.00","last_observed_at":"2026-11-11T04:11:08+00:00","low_30d":"79.00","low_90d":"79.00","median_price":"79.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-11T04:11:08+00:00"}}