As with most major purchases, it pays to shop around for a management systems certification body (CB). Investigate, ask for and check references, and request the resumes of the audit team proposed by the CB. You are the customer and the CB provides a service to you. Make sure you get what you pay for, but do not let price alone be the deciding factor. Look for added value.
Things to consider when selecting a CB:
For a complete list of ANAB-accredited CBs, see the CB Database.
Video: ANAB Vice President Randy Dougherty explains the difference between an accredited certification body and an unaccredited one, and what to look for on a certificate.