Is the paid consultation service for buying a house reliable?

Is the paid consultation service for buying a house reliable? According to the relevant information, there is no knowledge consultation on real estate, and the fees are free. In particular, it is completely free and very reliable to find some second-hand housing practitioners to consult relevant real estate information. The company has a business license, normal operation, specific office location, good operating conditions, no risk record, and the actual operation is consistent with the certificate.