{"current_listings":[{"buy_url":"https://birkinbagstock.com/go/collector-square-413240","currency":"USD","detail_url":"https://birkinbagstock.com/listing/collector-square-413240","id":"collector-square-413240","merchant":"Collector Square","price":17386,"title":"Herm\u00e8s Constance 18 cm handbag in Noir Swift leather"},{"buy_url":"https://birkinbagstock.com/go/lux-second-chance-9429452062951","currency":"USD","detail_url":"https://birkinbagstock.com/listing/lux-second-chance-9429452062951","id":"lux-second-chance-9429452062951","merchant":"Lux Second Chance","price":13068,"title":"Hermes 2016 Black Swift Leather Mini Constance 18"},{"buy_url":"https://birkinbagstock.com/go/jewels-aficionado-10028118016307","currency":"USD","detail_url":"https://birkinbagstock.com/listing/jewels-aficionado-10028118016307","id":"jewels-aficionado-10028118016307","merchant":"Jewels Aficionado","price":32000,"title":"Herm\u00e8s Noir Constance 18 \"Dancing Flowers\" Embroidered Swift Palladium Hardware"},{"buy_url":"https://birkinbagstock.com/go/mine-and-yours-MY182484-C","currency":"USD","detail_url":"https://birkinbagstock.com/listing/mine-and-yours-MY182484-C","id":"mine-and-yours-MY182484-C","merchant":"Mine & Yours","price":14933,"title":"Herm\u00e8s 2016 Black Swift Leather Mini Constance 18"},{"buy_url":"https://birkinbagstock.com/go/avenue-tokyo-10160157589697","currency":"USD","detail_url":"https://birkinbagstock.com/listing/avenue-tokyo-10160157589697","id":"avenue-tokyo-10160157589697","merchant":"AVENUE TOKYO","price":9979,"title":"HERMES CONSTANCE 18 BLACK SWIFT MARBLED SILVER HARDWARE"},{"buy_url":"https://birkinbagstock.com/go/madison-avenue-H-C-260812-2-MP","currency":"USD","detail_url":"https://birkinbagstock.com/listing/madison-avenue-H-C-260812-2-MP","id":"madison-avenue-H-C-260812-2-MP","merchant":"Madison Avenue Couture","price":12000,"title":"Herm\u00e8s Pre-owned Hermes Constance 18 Black Swift Marbled Palladium Hardware"}],"data_url":"https://birkinbagstock.com/data/price-history/constance-18-black-swift.json","filters":{"color":"Black","leather":"Swift","size":18,"sort":"newest","style":"constance"},"generated_at":"2026-10-21T10:42:04.030133+00:00","history":{"change":0,"change_label":"$0","change_pct":0.0,"current_listings":6,"data_url":"/data/price-history/constance-18-black-swift.json","direction":"flat","events":[],"first_date":"2026-10-21","first_median_price":14000,"first_median_price_label":"$14,000","history":[{"date":"2026-10-21","day":"20261021","max_price":32000,"max_price_label":"$32,000","median_price":14000,"median_price_label":"$14,000","min_price":9979,"min_price_label":"$9,979","sample":6}],"history_url":"/price-history/constance-18-black-swift","label":"Birkin 18 Black Swift","last_date":"2026-10-21","last_median_price":14000,"last_median_price_label":"$14,000","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":6,"slug":"constance-18-black-swift","status":"one_point","summary":"Birkin 18 Black Swift median first captured at $14,000 on 2026-10-21."},"license":"Public citation dataset. Attribute BirkinBagStock.com and verify merchant prices before purchase.","slug":"constance-18-black-swift","source":"BirkinBagStock.com","title":"Constance 18 Black Swift \u2014 Live Inventory Across Verified Resellers","url":"https://birkinbagstock.com/price-history/constance-18-black-swift"}