{"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":"2026-10-21T03:10:02+00:00","price":"299.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B099VXVKPN?maas=maas_adg_api_589335864481531507_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB5863fbda61f70d67c326a43701a450ef_d73b9d4ab8b1&aa_adgroupid=ffbdefeba65db910df07fbc8992b7a01_PBSEP_!!!affid!!!_118045_&aa_creativeid=85a6VX5QzDBBxG9xCTMWjtpCuKYwnAlVOR9Wvvj33LxwDkQ_c"}],"product":{"brand":"Inofia UK","evidence_url":"https://mainbuyer.com/evidence/products/inofia-king-size-mattress-memory-foam-5ft-11-inch-hybrid-sprung-mattress-b099vxvkpn/prices","gtin":null,"id":19057,"model_number":null,"name":"Inofia King Size Mattress Memory Foam 5FT, 11 Inch Hybrid Sprung Mattress","product_url":"https://mainbuyer.com/product/inofia-king-size-mattress-memory-foam-5ft-11-inch-hybrid-sprung-mattress-b099vxvkpn","urn":"MB-AWIN-GB-B099VXVKPN"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"299.99","historical_low":"299.99","last_observed_at":"2026-10-21T03:10:02+00:00","low_30d":"299.99","low_90d":"299.99","median_price":"299.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-10-21T03:10:02+00:00"}}