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available.","error_source_n":0,"freshness_contract_version":"2026-07-27.v1","observed_source_n":24,"source_n":27,"sources":[{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:01.680575+00:00","last_healthy_at":"2026-08-02T06:44:01.680575+00:00","observed_n":1,"source":"1stdibs","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:15:10.882792+00:00","last_healthy_at":"2026-08-08T18:15:10.882792+00:00","observed_n":13,"source":"anns","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:22:31.774485+00:00","last_healthy_at":"2026-08-08T18:22:31.774485+00:00","observed_n":85,"source":"bagista","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:30.821134+00:00","last_healthy_at":"2026-07-31T06:30:57.033477+00:00","observed_n":0,"source":"chicjoy","status":"degraded"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:40:54.571594+00:00","last_healthy_at":"2026-08-08T18:40:54.571594+00:00","observed_n":8,"source":"couture_usa","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:01.893096+00:00","last_healthy_at":"2026-08-02T06:44:01.893096+00:00","observed_n":1,"source":"ebay","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:05:10.285393+00:00","last_healthy_at":"2026-08-08T18:05:10.285393+00:00","observed_n":272,"source":"fashionphile","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:31.699406+00:00","last_healthy_at":"2026-08-04T12:30:34.392623+00:00","observed_n":0,"source":"handbag_clinic","status":"degraded"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:29.383353+00:00","last_healthy_at":"2026-08-08T18:30:29.383353+00:00","observed_n":140,"source":"janefinds","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:22:14.087529+00:00","last_healthy_at":"2026-08-08T18:22:14.087529+00:00","observed_n":24,"source":"labellov","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:22:24.812964+00:00","last_healthy_at":"2026-08-08T18:22:24.812964+00:00","observed_n":30,"source":"lilac_blue","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:15:07.856577+00:00","last_healthy_at":null,"observed_n":0,"source":"love_luxury","status":"degraded"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:40:51.508367+00:00","last_healthy_at":"2026-08-08T18:40:51.508367+00:00","observed_n":1,"source":"love_that_bag","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:40:40.987324+00:00","last_healthy_at":"2026-08-08T18:40:40.987324+00:00","observed_n":52,"source":"lux_addicts","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:40:45.445443+00:00","last_healthy_at":"2026-08-08T18:40:45.445443+00:00","observed_n":63,"source":"luxury_promise","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:18:10.799850+00:00","last_healthy_at":"2026-08-08T18:18:10.799850+00:00","observed_n":583,"source":"madison_avenue","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:40:36.449482+00:00","last_healthy_at":"2026-08-08T18:40:36.449482+00:00","observed_n":1,"source":"miami_lux","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:02.207331+00:00","last_healthy_at":"2026-08-02T06:44:02.207331+00:00","observed_n":1,"source":"mytheresa","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:31.424635+00:00","last_healthy_at":"2026-08-08T18:30:31.424635+00:00","observed_n":6,"source":"preloved_branded","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:14.757640+00:00","last_healthy_at":"2026-08-08T18:30:14.757640+00:00","observed_n":572,"source":"prive_porter","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:10:22.628815+00:00","last_healthy_at":"2026-08-08T18:10:22.628815+00:00","observed_n":77,"source":"rebag","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:30:30.295774+00:00","last_healthy_at":"2026-08-08T18:30:30.295774+00:00","observed_n":58,"source":"redeluxe","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:02.048746+00:00","last_healthy_at":"2026-08-02T06:44:02.048746+00:00","observed_n":1,"source":"saks","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:22:21.418948+00:00","last_healthy_at":"2026-08-08T18:22:21.418948+00:00","observed_n":29,"source":"sellier","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:01.253967+00:00","last_healthy_at":"2026-08-02T06:44:01.253967+00:00","observed_n":1,"source":"therealreal","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-02T06:44:01.458889+00:00","last_healthy_at":"2026-08-02T06:44:01.458889+00:00","observed_n":1,"source":"vestiaire","status":"observed_unverified"},{"authoritative_full_feed":false,"last_completed_at":"2026-08-08T18:22:15.199655+00:00","last_healthy_at":"2026-08-08T18:22:15.199655+00:00","observed_n":10,"source":"vintage_contessa","status":"observed_unverified"}],"status":"reported","status_counts":{"degraded":3,"observed_unverified":24},"verified_complete_source_n":0},"with_last_observed_timestamp_n":0,"without_last_observed_timestamp_n":3889},"dataset_id":"birkin-resale-market-observed-2026-08","exclusions":{"duplicate_listing_id_rows":0,"from_usd_price_statistics":{"missing_ask":1},"from_usd_price_statistics_n":1,"invalid_non_object_rows":0,"missing_listing_id_rows":0,"note":"Rows 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":3889},"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":"2026-08-08T23:21:52.610428+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":34218,"median_ask_usd":25995,"min_ask_usd":6995,"observed_n":3889,"p25_ask_usd":18500,"p75_ask_usd":35000,"priced_n":3888},"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":"2026-08","source":{"csv_url":"https://birkinbagstock.com/data/market-snapshots/2026-08.csv","json_url":"https://birkinbagstock.com/data/market-snapshots/2026-08.json","name":"BirkinBagStock","url":"https://birkinbagstock.com/research/birkin-resale-market-dataset"}}