I want to know how to buy something from this machine .   Yeah , the new ones can be tricky . What are you trying to buy ?   I want to buy one of those snack things .   Are you ready to go ?   I'm clear so far .   The money goes in the slot over there . It has to be smooth to go in .   It won't go in !   Just remember that you might have to feed the money in a couple of times to get it to work .   Yes , next step .   Make your selection and hope for the best . Vending machines aren't all that reliable .   They're totally unreliable . 