{"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":"2026-10-23T03:10:36+00:00","price":"179.95","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0G57PKLQ9?maas=maas_adg_api_579967245749788136_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB91ff4ee529c02fe4ce2615b2925f50e7_a3c16f878821&aa_adgroupid=82c05be7cc94cf581aa3300f1860bd39_PBSEP_!!!affid!!!_118045_&aa_creativeid=3846g9roSf0q_barsAl0jCsPi5t1H9uKuOnDPSP2h674_aCw4_c"}],"product":{"brand":"FlexiSpot UK","evidence_url":"https://mainbuyer.com/evidence/products/flexispot-big-max-pro-ergonomic-office-chair-227kg-heavy-duty-mesh-desk-chair-with-wide-seat-adjustable-headrest-90-flip-up-armrests-lumbar-sup-b0g57pklq9/prices","gtin":null,"id":19692,"model_number":null,"name":"FLEXISPOT BIG MAX PRO Ergonomic Office Chair 227kg, Heavy Duty Mesh Desk Chair with Wide Seat, Adjustable Headrest, 90\u00c2\u00b0 Flip-Up Armrests & Lumbar Sup","product_url":"https://mainbuyer.com/product/flexispot-big-max-pro-ergonomic-office-chair-227kg-heavy-duty-mesh-desk-chair-with-wide-seat-adjustable-headrest-90-flip-up-armrests-lumbar-sup-b0g57pklq9","urn":"MB-AWIN-GB-B0G57PKLQ9"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"179.95","historical_low":"179.95","last_observed_at":"2026-10-23T03:10:36+00:00","low_30d":"179.95","low_90d":"179.95","median_price":"179.95","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-10-23T03:10:36+00:00"}}