{"current_listings":[{"buy_url":"https://birkinbagstock.com/go/bagista-SOR8689","currency":"USD","detail_url":"https://birkinbagstock.com/listing/bagista-SOR8689","id":"bagista-SOR8689","merchant":"Bagista","price":13999,"title":"Herm\u00e8s Constance 18 - Rouge H Box Calf | Gold Hardware"},{"buy_url":"https://birkinbagstock.com/go/rebag-446464_153","currency":"USD","detail_url":"https://birkinbagstock.com/listing/rebag-446464_153","id":"rebag-446464_153","merchant":"Rebag","price":18650,"title":"Herm\u00e8s Constance NM Bag Box Calf 18"},{"buy_url":"https://birkinbagstock.com/go/rebag-437118_1","currency":"USD","detail_url":"https://birkinbagstock.com/listing/rebag-437118_1","id":"rebag-437118_1","merchant":"Rebag","price":17910,"title":"Herm\u00e8s Constance NM Bag Box Calf 18"},{"buy_url":"https://birkinbagstock.com/go/rebag-434801_2","currency":"USD","detail_url":"https://birkinbagstock.com/listing/rebag-434801_2","id":"rebag-434801_2","merchant":"Rebag","price":17135,"title":"Herm\u00e8s Constance NM Bag Box Calf 18"},{"buy_url":"https://birkinbagstock.com/go/prive-porter-39741327638594","currency":"USD","detail_url":"https://birkinbagstock.com/listing/prive-porter-39741327638594","id":"prive-porter-39741327638594","merchant":"Priv\u00e9 Porter","price":48000,"title":"Herm\u00e8s 18cm Constance Cloute Black Box Calf Palladium Hardware"},{"buy_url":"https://birkinbagstock.com/go/bagista-SOR7351","currency":"USD","detail_url":"https://birkinbagstock.com/listing/bagista-SOR7351","id":"bagista-SOR7351","merchant":"Bagista","price":13999,"title":"Herm\u00e8s Constance 18 - Black Box Calf | Gold Hardware"}],"data_url":"https://birkinbagstock.com/data/price-history/constance-18-box-calf.json","filters":{"leather":"Box Calf","size":18,"sort":"newest","style":"constance"},"generated_at":"2026-09-22T21:01:41.028761+00:00","history":{"change":0,"change_label":"$0","change_pct":0.0,"current_listings":6,"data_url":"/data/price-history/constance-18-box-calf.json","direction":"flat","events":[],"first_date":"2026-09-22","first_median_price":17522,"first_median_price_label":"$17,522","history":[{"date":"2026-09-22","day":"20260922","max_price":48000,"max_price_label":"$48,000","median_price":17522,"median_price_label":"$17,522","min_price":13999,"min_price_label":"$13,999","sample":6}],"history_url":"/price-history/constance-18-box-calf","label":"Birkin 18 Box Calf","last_date":"2026-09-22","last_median_price":17522,"last_median_price_label":"$17,522","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":6,"slug":"constance-18-box-calf","status":"one_point","summary":"Birkin 18 Box Calf median first captured at $17,522 on 2026-09-22."},"license":"Public citation dataset. Attribute BirkinBagStock.com and verify merchant prices before purchase.","slug":"constance-18-box-calf","source":"BirkinBagStock.com","title":"Constance 18 Box Calf \u2014 Live Inventory Across Verified Resellers","url":"https://birkinbagstock.com/price-history/constance-18-box-calf"}