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available.","error_source_n":3,"freshness_contract_version":"2026-07-27.v1","observed_source_n":21,"source_n":27,"sources":[{"authoritative_full_feed":false,"last_completed_at":"2026-08-30T06:44:03.209973+00:00","last_healthy_at":"2026-08-30T06:44:03.209973+00:00","observed_n":1,"source":"1stdibs","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:15:39.363586+00:00","last_healthy_at":"2026-09-01T00:15:39.363586+00:00","observed_n":13,"source":"anns","status":"observed_unverified"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:22:28.728363+00:00","last_healthy_at":"2026-09-01T00:22:28.728363+00:00","observed_n":86,"source":"bagista","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:30:35.343598+00:00","last_healthy_at":"2026-07-31T06:30:57.033477+00:00","observed_n":0,"source":"chicjoy","status":"error"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:40:27.312095+00:00","last_healthy_at":"2026-09-01T00:40:27.312095+00:00","observed_n":7,"source":"couture_usa","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-30T06:44:03.415821+00:00","last_healthy_at":"2026-08-30T06:44:03.415821+00:00","observed_n":1,"source":"ebay","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:05:14.603702+00:00","last_healthy_at":"2026-09-01T00:05:14.603702+00:00","observed_n":240,"source":"fashionphile","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:30:36.586955+00:00","last_healthy_at":"2026-08-04T12:30:34.392623+00:00","observed_n":0,"source":"handbag_clinic","status":"error"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:30:33.931198+00:00","last_healthy_at":"2026-09-01T00:30:33.931198+00:00","observed_n":151,"source":"janefinds","status":"verified_complete"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:22:10.345144+00:00","last_healthy_at":"2026-08-14T04:13:53.450891+00:00","observed_n":24,"source":"labellov","status":"degraded"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:22:21.063547+00:00","last_healthy_at":"2026-09-01T00:22:21.063547+00:00","observed_n":33,"source":"lilac_blue","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:15:36.932986+00:00","last_healthy_at":"2026-09-01T00:15:36.932986+00:00","observed_n":58,"source":"love_luxury","status":"observed_unverified"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:40:26.781242+00:00","last_healthy_at":"2026-09-01T00:40:26.781242+00:00","observed_n":1,"source":"love_that_bag","status":"verified_complete"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:40:19.539920+00:00","last_healthy_at":"2026-08-14T04:14:33.820388+00:00","observed_n":48,"source":"lux_addicts","status":"degraded"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:40:21.767117+00:00","last_healthy_at":"2026-08-14T04:14:38.757037+00:00","observed_n":137,"source":"luxury_promise","status":"degraded"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:18:14.212948+00:00","last_healthy_at":"2026-08-24T18:18:08.917853+00:00","observed_n":604,"source":"madison_avenue","status":"error"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:40:14.490058+00:00","last_healthy_at":"2026-09-01T00:40:14.490058+00:00","observed_n":1,"source":"miami_lux","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-30T06:44:03.847583+00:00","last_healthy_at":"2026-08-30T06:44:03.847583+00:00","observed_n":1,"source":"mytheresa","status":"observed_unverified"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:30:36.004037+00:00","last_healthy_at":"2026-09-01T00:30:36.004037+00:00","observed_n":6,"source":"preloved_branded","status":"verified_complete"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:30:25.155168+00:00","last_healthy_at":"2026-09-01T00:30:25.155168+00:00","observed_n":579,"source":"prive_porter","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-09-01T00:10:24.803505+00:00","last_healthy_at":"2026-09-01T00:10:24.803505+00:00","observed_n":69,"source":"rebag","status":"observed_unverified"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:30:34.740950+00:00","last_healthy_at":"2026-09-01T00:30:34.740950+00:00","observed_n":55,"source":"redeluxe","status":"verified_complete"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-30T06:44:03.680478+00:00","last_healthy_at":"2026-08-30T06:44:03.680478+00:00","observed_n":1,"source":"saks","status":"observed_unverified"},{"authoritative_full_feed":true,"last_completed_at":"2026-09-01T00:22:16.136017+00:00","last_healthy_at":"2026-09-01T00:22:16.136017+00:00","obs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excluded from USD price statistics can remain in observed listing counts; this prevents a missing, non-positive, non-finite, or non-USD ask from distorting price cohorts."},"fx":{"converted_from_non_usd_n":0,"included_price_rule":"Only positive finite asks stored with reporting currency USD are analyzed.","observed_original_currency_counts":{"USD":4281},"reporting_currency":"USD","treatment":"Some source adapters convert merchant prices to USD during ingestion and preserve original_price and original_currency. This snapshot uses the stored USD ask and does not independently refresh, reconstruct, or audit the adapter FX factor. Non-USD reporting rows are excluded."},"generated_at":"2026-09-01T01:23:08.755143+00:00","immutable":true,"methodology":{"cohort_rule":"Cohort observed_n counts unique listings carrying the dimension value; priced_n counts the USD-price subset.","deduplication":"Rows are deduplicated by listing ID. If an input repeats an ID, the row with the latest available observation/update timestamp is retained with a deterministic tie-break.","percentiles":"P25, median, and P75 use the closest observed value at floor((n-1)*p+0.5) after ascending sort.","price_inclusion":"A row enters price statistics only when its ask is finite, greater than zero, and its reporting currency is USD.","price_measure":"merchant asking price stored in USD; not a transaction price","revision_policy":"The first successfully persisted snapshot for a UTC month is immutable. Corrections require a new methodology version and explicit publication path.","source_completeness":"Per-source scraper health is disclosed separately. Only feeds explicitly marked verified_complete have product-grade completeness evidence; observed_unverified feeds are not treated as exhaustive.","unit_of_observation":"one unique public listing ID at snapshot time","version":"2026-08-09.v1"},"methodology_version":"2026-08-09.v1","overall":{"max_ask_usd":650000,"mean_ask_usd":33749,"median_ask_usd":25815,"min_ask_usd":6995,"observed_n":4281,"p25_ask_usd":18590,"p75_ask_usd":34500,"priced_n":4280},"reuse":{"attribution":"Data from BirkinBagStock observed Birkin resale market snapshot.","notice":"Aggregate snapshot may be cited with attribution. Underlying merchant listing content, images, availability, prices, and terms remain subject to their source owners and must be rechecked.","terms_url":"https://birkinbagstock.com/terms"},"snapshot_kind":"point_in_time_observed_public_asking_prices","snapshot_period":"2026-09","source":{"csv_url":"https://birkinbagstock.com/data/market-snapshots/2026-09.csv","json_url":"https://birkinbagstock.com/data/market-snapshots/2026-09.json","name":"BirkinBagStock","url":"https://birkinbagstock.com/research/birkin-resale-market-dataset"}}