The golden rule in purchasing anything over the Internet is to find out who you are dealing with. The first step is to make sure the company is legal and has clearly stated sales and security policies, which should be easy to access on its Web site. Buyers should also pay close attention to the terms and conditions of sale, such as whether there are any hidden extras in the form of delivery costs. Of course, it is essential that the firm can guarantee the security of personal information and credit card numbers. Otherwise, you may end up being charged more than you bargained for.