{"current_listings":[{"buy_url":"https://birkinbagstock.com/go/collector-square-399220","currency":"USD","detail_url":"https://birkinbagstock.com/listing/collector-square-399220","id":"collector-square-399220","merchant":"Collector Square","price":13236,"title":"Herm\u00e8s Constance 18 cm shoulder bag in Bleu Saphir box leather"},{"buy_url":"https://birkinbagstock.com/go/avenue-tokyo-11065769951425","currency":"USD","detail_url":"https://birkinbagstock.com/listing/avenue-tokyo-11065769951425","id":"avenue-tokyo-11065769951425","merchant":"AVENUE TOKYO","price":13808,"title":"Hermes Mini Constance 18 Verso Bleu Saphir Menthe Chevre Mysore Permabrass Hardware"},{"buy_url":"https://birkinbagstock.com/go/luxe-du-jour-1310920","currency":"USD","detail_url":"https://birkinbagstock.com/listing/luxe-du-jour-1310920","id":"luxe-du-jour-1310920","merchant":"Luxe Du Jour","price":7425,"title":"Hermes Bleu Saphir Swift Constance 18"},{"buy_url":"https://birkinbagstock.com/go/madison-avenue-H-C-250418-1","currency":"USD","detail_url":"https://birkinbagstock.com/listing/madison-avenue-H-C-250418-1","id":"madison-avenue-H-C-250418-1","merchant":"Madison Avenue Couture","price":39500,"title":"Hermes Constance 18 Bleu Saphir Matte Alligator Gold Hardware"}],"data_url":"https://birkinbagstock.com/data/price-history/constance-18-bleu-saphir.json","filters":{"color":"Bleu Saphir","size":18,"sort":"newest","style":"constance"},"generated_at":"2026-10-21T10:42:03.756765+00:00","history":{"change":0,"change_label":"$0","change_pct":0.0,"current_listings":4,"data_url":"/data/price-history/constance-18-bleu-saphir.json","direction":"flat","events":[],"first_date":"2026-10-21","first_median_price":13522,"first_median_price_label":"$13,522","history":[{"date":"2026-10-21","day":"20261021","max_price":39500,"max_price_label":"$39,500","median_price":13522,"median_price_label":"$13,522","min_price":7425,"min_price_label":"$7,425","sample":4}],"history_url":"/price-history/constance-18-bleu-saphir","label":"Birkin 18 Bleu Saphir","last_date":"2026-10-21","last_median_price":13522,"last_median_price_label":"$13,522","methodology":"Spec history uses daily captured prices for the current visible cohort of live listings. The median series is descriptive asking-price intelligence, not an appraisal or completed-sale index.","observations":1,"sample_listings":4,"slug":"constance-18-bleu-saphir","status":"one_point","summary":"Birkin 18 Bleu Saphir median first captured at $13,522 on 2026-10-21."},"license":"Public citation dataset. Attribute BirkinBagStock.com and verify merchant prices before purchase.","slug":"constance-18-bleu-saphir","source":"BirkinBagStock.com","title":"Constance 18 Bleu Saphir \u2014 Live Inventory Across Verified Resellers","url":"https://birkinbagstock.com/price-history/constance-18-bleu-saphir"}