{"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":"139.98","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0H7S4P9T4?maas=maas_adg_api_584985215261907273_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBd3060ec4b5db4ac5d262154a04c9e8f1&aa_adgroupid=e5d62340e6566204099d008b6a711f44_PBSEP_!!!affid!!!_118045_&aa_creativeid=34242wPgAflZ0H4igD5W8rY57DU_bZKD7eAXmAPR80IpJjg8_c"}],"product":{"brand":"SIHOO UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/sihoo-full-mesh-office-chair-adaptive-lumbar-support-300-lb-b0h7s4p9t4/prices","gtin":null,"id":9289,"model_number":null,"name":"SIHOO Full-Mesh Office Chair, Adaptive Lumbar Support, 300 lb","product_url":"https://mail.mainbuyer.com/product/sihoo-full-mesh-office-chair-adaptive-lumbar-support-300-lb-b0h7s4p9t4","urn":"MB-AWIN-GB-B0H7S4P9T4"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"139.98","historical_low":"139.98","last_observed_at":"2026-09-17T12:28:25+00:00","low_30d":"139.98","low_90d":"139.98","median_price":"139.98","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:28:25+00:00"}}