{"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":"2026-09-17T12:29:19+00:00","price":"399.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0H8NSG884?maas=maas_adg_api_584985215261907273_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBd3060ec4b5db4ac5d262154a04c9e8f1&aa_adgroupid=511ac10e98946535eb20c3434f92af40_PBSEP_!!!affid!!!_118045_&aa_creativeid=066eba4QMmbdPwdnYJaa9tkj4dIRhHByNmpfqWdhcPqc4Hw_c"}],"product":{"brand":"SIHOO UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/sihoo-ergonomic-office-chair-with-dynamic-lumbar-support-3d-armrests-adjustable-backrest-footrest-for-enhanced-comfort-desk-chair-for-home-office-b0h8nsg884/prices","gtin":null,"id":11046,"model_number":null,"name":"SIHOO Ergonomic Office Chair with Dynamic Lumbar Support, 3D Armrests & Adjustable Backrest, Footrest for Enhanced Comfort, Desk Chair for Home Office","product_url":"https://mail.mainbuyer.com/product/sihoo-ergonomic-office-chair-with-dynamic-lumbar-support-3d-armrests-adjustable-backrest-footrest-for-enhanced-comfort-desk-chair-for-home-office-b0h8nsg884","urn":"MB-AWIN-GB-B0H8NSG884"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"399.99","historical_low":"399.99","last_observed_at":"2026-09-17T12:29:19+00:00","low_30d":"399.99","low_90d":"399.99","median_price":"399.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:29:19+00:00"}}