1step,listings_remaining,dropped2S0 all listings in snapshot,273265,03− kind != auto,271992,12734− VIN duplicate (non-canonical),259133,128595"− model year outside [2005,2026] or missing",256651,24826"− mileage outside [1000,400000] km or missing",249958,66937"− entry price outside [2000,250000] $ or missing/placeholder",241321,86378− make or model missing,241298,239− uid identity collision,241297,110− sampled portal (autotrader/cargurus) or private marketplace (kijiji),136393,10490411− flickering/failed connector or small portal,128144,824912− oscillating price path,128091,5313− left-censored stock (day 1 or source start-up day),80856,4723514