{"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":"2026-10-23T03:10:45+00:00","price":"399.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0H6PGYFBM?maas=maas_adg_api_579967245749788136_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB91ff4ee529c02fe4ce2615b2925f50e7_25ed7456a1d0&aa_adgroupid=f2cad687de997c11a084ea215b14ffd0_PBSEP_!!!affid!!!_118045_&aa_creativeid=eaa56X53QFSUup7cgPL2aMFDuyPpsyYXqLLTEUuitB666wM_c"}],"product":{"brand":"FlexiSpot UK","evidence_url":"https://mainbuyer.com/evidence/products/flexispot-ergox-max-ergonomic-office-chair-300kg-heavy-duty-big-tall-mesh-desk-chair-with-footrest-5d-armrests-4d-headrest-adjustable-backrest-b0h6pgyfbm/prices","gtin":null,"id":19867,"model_number":null,"name":"FLEXISPOT ErgoX Max Ergonomic Office Chair, 300kg Heavy Duty Big & Tall Mesh Desk Chair with Footrest, 5D Armrests & 4D Headrest, Adjustable Backrest","product_url":"https://mainbuyer.com/product/flexispot-ergox-max-ergonomic-office-chair-300kg-heavy-duty-big-tall-mesh-desk-chair-with-footrest-5d-armrests-4d-headrest-adjustable-backrest-b0h6pgyfbm","urn":"MB-AWIN-GB-B0H6PGYFBM"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"399.99","historical_low":"399.99","last_observed_at":"2026-10-23T03:10:45+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":"2026-10-23T03:10:45+00:00"}}