Core Skin Care offers a "free" trial of wrinkle cream for just paying S&H ($4.99). They sent the sample, charged my account the appropriate $4.99, then charged another $.99 for good measure and then $89. I think they sign you up for some kind of monthly subscription that they fail to tell you about. The $89 charge didn't even accompany getting anything else.
When I called to complain they said they would not reverse charge. After yelling and screaming they offered to charge half. After yelling louder a supervisor OK'd the refund. Any honest company would tell you up front that your "free" sample included future charges of exhorbitant amounts for unknown products.