{"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":"2026-09-17T12:29:27+00:00","price":"19.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0F5PSW4WV?maas=maas_adg_api_581646868491216871_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB09bc873fb87714f860ce3bb600e3e949&aa_adgroupid=500610f573d51516dee9daa4735dc4e9_PBSEP_!!!affid!!!_118045_&aa_creativeid=66ecJ_bAkoGLftiIIey_a_aHYWTjCyqYePriA8CoeDI8cDUdWU_c"}],"product":{"brand":"RUMMY AMZ","evidence_url":"https://mainbuyer.com/evidence/products/rummy-memory-foam-lumbar-support-pillow-for-office-chair-and-bed-ergonomic-back-cushion-with-washable-cover-grey-b0f5psw4wv/prices","gtin":null,"id":11238,"model_number":null,"name":"RUMMY Memory Foam Lumbar Support Pillow for Office Chair and Bed \u00e2?? Ergonomic Back Cushion with Washable Cover (Grey)","product_url":"https://mainbuyer.com/product/rummy-memory-foam-lumbar-support-pillow-for-office-chair-and-bed-ergonomic-back-cushion-with-washable-cover-grey-b0f5psw4wv","urn":"MB-AWIN-GB-B0F5PSW4WV"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"19.99","historical_low":"19.99","last_observed_at":"2026-09-17T12:29:27+00:00","low_30d":"19.99","low_90d":"19.99","median_price":"19.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:29:27+00:00"}}