Who are you selling to? Who is your customer?
If you are new to the business market sometimes this question cannot be easily answered. If you are not able to answer this question, stop and research the market you are planning to join. This will be critical to ensure you are marketing and pricing your items competitively, giving the best value to consumers. Ideally you can market and sell anything but it would be best not to market feminine items to male consumers.
Rule of Thumb: Know your customer.