"No matter how much money is on the table, I don't think I can sell a product or service that I personally don't believe in. If I do, I would feel as if I'm deceiving customers. However, it would also depend on why I don't believe in the product. If it's just a couple of things that I'm not too confident about, I could probably highlight benefits and features and still be honest about any shortcomings. It's important to be realistic and upfront with customer expectations. If I wholeheartedly feel that what I'm selling is fraudulent, I would walk away from the job. It's not worth the guilt I would feel later on, plus the possibility of being sued is not enticing at all."
