{"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":"2026-09-17T12:30:29+00:00","price":"2499.00","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0G1CGP4CC?maas=maas_adg_api_581874158556825993_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBee120df45fc8bbc8422f6c7bcbc40fa4&aa_adgroupid=b9003607505236e54cc68fd46f1be596_PBSEP_!!!affid!!!_118045_&aa_creativeid=d5574yCQ4wW68Uu2WCFV2HydXlAgIK4ascKCcUtAdUdAbM4_c"}],"product":{"brand":"BLUETTI UK","evidence_url":"https://www.mainbuyer.com/evidence/products/bluetti-b500k-expansion-battery-5120wh-lifepo4-battery-pack-for-power-station-ac200l-ac300-ac500-ac200max-extra-battery-for-home-emergency-off-gri-b0g1cgp4cc/prices","gtin":null,"id":12723,"model_number":null,"name":"BLUETTI B500K Expansion Battery, 5120Wh LiFePO4 Battery Pack for Power Station AC200L AC300 AC500 AC200MAX, Extra Battery for Home, Emergency, Off-Gri","product_url":"https://www.mainbuyer.com/product/bluetti-b500k-expansion-battery-5120wh-lifepo4-battery-pack-for-power-station-ac200l-ac300-ac500-ac200max-extra-battery-for-home-emergency-off-gri-b0g1cgp4cc","urn":"MB-AWIN-GB-B0G1CGP4CC"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"2499.00","historical_low":"2499.00","last_observed_at":"2026-09-17T12:30:29+00:00","low_30d":"2499.00","low_90d":"2499.00","median_price":"2499.00","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:30:29+00:00"}}