Good salesmen with good sales jobs are getting a better pay than others, and companies hire salesmen who can sell themselves at the interviews. You have a better chance of getting a sales job if you can convince the recruiters that you have a clear idea where you are heading; so specify the sales job you want, don't show that you are ready to work at any random sales job.
Find out more about the company you are interviewing with and think up ways in which you could help them sell better. Give a number of interviews for sales jobs before you interview for your dream job: the practice will help you do better at the right time.