{"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":"2026-09-17T12:28:25+00:00","price":"273.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0H4LSCS5C?maas=maas_adg_api_584985215261907273_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBd3060ec4b5db4ac5d262154a04c9e8f1&aa_adgroupid=ea4ab748b846f36927ddb55fae713d88_PBSEP_!!!affid!!!_118045_&aa_creativeid=a5e5ZyDclBjwRAoiusls87aw2cVhN8O0JSsb9q9KOJjMRHY_c"}],"product":{"brand":"SIHOO UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/sihoo-m102c-ergonomic-mesh-office-chair-high-back-desk-chair-with-3d-armrests-up-down-lumbar-support-swivel-computer-task-chair-black-2-packs-b0h4lscs5c/prices","gtin":null,"id":9288,"model_number":null,"name":"SIHOO M102C Ergonomic Mesh Office Chair, High Back desk chair with 3D Armrests, Up&Down Lumbar Support, Swivel Computer Task Chair, Black-2 Packs","product_url":"https://mail.mainbuyer.com/product/sihoo-m102c-ergonomic-mesh-office-chair-high-back-desk-chair-with-3d-armrests-up-down-lumbar-support-swivel-computer-task-chair-black-2-packs-b0h4lscs5c","urn":"MB-AWIN-GB-B0H4LSCS5C"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"273.99","historical_low":"273.99","last_observed_at":"2026-09-17T12:28:25+00:00","low_30d":"273.99","low_90d":"273.99","median_price":"273.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:28:25+00:00"}}