At between $275 and $325 per class, the Dear Rich staff feels that your registration can get kind of expensive. On the other hand, you can enforce trademark rights without a federal registration. In other words, you don't need the registration in these classes in order to sell the goods. For example, you can stop others from infringing under common law trademark rights, and you can possibly stop others from registering the same name in these merchandise classes by arguing that it is likely that your business will expand to offer merchandise. So, if money is tight, you might want to wait on the registration (or at least register only the class for the item that you find to be most popular). On the other hand, if you're flush with cash (or babies), and business is going well, then the registration may be worth the investment.