One big red flag is when a provider promises huge volumes of leads for a very low price, which usually means poor quality or recycled contacts. Also, if they can’t clearly explain where and how they source their leads, that’s a bad sign. In my own experience, I’ve seen services that looked trustworthy at first but turned out to be among the worst auto transport leads providers because the data was outdated or shared with way too many brokers. It’s always smart to test a small batch first and see how responsive the leads really are before committing to a big spend.