{"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":"2026-11-01T04:08:55+00:00","price":"14.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0D72XCG6Q?maas=maas_adg_api_588563440394542563_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBe2fcc25dc0f6758aeaa49f034c422261_68dbd4783913&aa_adgroupid=1c3780d33bc045af8e2576be58fa2cd6_PBSEP_!!!affid!!!_118045_&aa_creativeid=9545nQdjJ9OzUnTQwhfdo_bVprfJvTdIzd8tSWU99V2PwPZA_c"}],"product":{"brand":"UK-eufy Security","evidence_url":"https://www.mainbuyer.com/evidence/products/eufy-original-21mm-sizing-inserts-for-breast-pump-s1-pro-s1-e20-e10-b0d72xcg6q/prices","gtin":null,"id":20953,"model_number":null,"name":"eufy Original 21mm Sizing Inserts for Breast Pump S1 Pro/S1/E20/E10","product_url":"https://www.mainbuyer.com/product/eufy-original-21mm-sizing-inserts-for-breast-pump-s1-pro-s1-e20-e10-b0d72xcg6q","urn":"MB-AWIN-GB-B0D72XCG6Q"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"14.99","historical_low":"14.99","last_observed_at":"2026-11-01T04:08:55+00:00","low_30d":"14.99","low_90d":"14.99","median_price":"14.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-01T04:08:55+00:00"}}