{"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":"2026-09-17T12:29:47+00:00","price":"199.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0FJRPSSCF?maas=maas_adg_api_588870224729489810_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=46aedfa10a68c55a37174211e3ab0f19&aa_adgroupid=302616906a5e85c55f5776124adf20ad_PBSEP_!!!affid!!!_118045_&aa_creativeid=351cV2OynDXbvTC154MQM_bIQHI6HzEYXM1SncIthRhGu3LI_c"}],"product":{"brand":"Umitec UK","evidence_url":"https://mainbuyer.com/evidence/products/led-face-mask-red-light-therapy-mask-four-modes-blue-light-therapy-face-zone-maping-remote-control-4000mah-storage-bag-head-straps-eye-pads-s-b0fjrpsscf/prices","gtin":null,"id":11835,"model_number":null,"name":"LED Face Mask, Red Light Therapy Mask, Four Modes Blue Light Therapy, Face Zone Maping, Remote Control, 4000mAh, Storage Bag, Head Straps, Eye Pads(S/","product_url":"https://mainbuyer.com/product/led-face-mask-red-light-therapy-mask-four-modes-blue-light-therapy-face-zone-maping-remote-control-4000mah-storage-bag-head-straps-eye-pads-s-b0fjrpsscf","urn":"MB-AWIN-GB-B0FJRPSSCF"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"199.99","historical_low":"199.99","last_observed_at":"2026-09-17T12:29:47+00:00","low_30d":"199.99","low_90d":"199.99","median_price":"199.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:29:47+00:00"}}