GE electric dryer won't start

I have a GE DBL333EAOWW electric dryer that won’t start. It just makes a humming/buzzing sound when I turn the starter. Does this sound like a broken starter & how much should I expect to pay to replace it if it is?
Thanks in advance!

open the dryer door and hold down the door switch and hold the start button and spin the drum manually (with your 3rd hand) all at the same time and if it starts then you are probably looking at a bad motor