"Companies depend on sales consultants to establish trust between clients and companies through their marketing, interpersonal, and customer service skills. Expect to draw heavily on previous experience during an interview. Popular questions ask about situations in which you have changed a client's mind or demonstrated strong interpersonal skills during challenging times. You may also have to demonstrate your sales skills by pitching a product to the interviewer."
As stated above, you really need to dig deep about what makes you get up in the morning and it shouldn't be financially driven unless its generous. They will ask you later in the process what you'd do if you were making all kinda of money and blowing it in Vegas would not be the thing to say. This company wants to understand what make you tick and wants to see depth.