I partly disagree that completed sales will settle it, because they lag the listings you are watching and may reflect different financing conditions. I’d split the sample by neighbourhood, condition and initial versus reduced price, then record under-offer, withdrawn and still available...
One caveat: with a new build, some inspection findings may be defects to raise with the developer rather than repairs you should automatically fund yourself. That does not mean assuming everything will be resolved quickly. Keep cash available until you know what is accepted, what is disputed and...