Using AirMenu, create a menu with the different items you want to sell, and associate each item to a different SwitchBot, which pushes the items to the customer. AirMenu supports PayPal, Stripe, Bitcoins, MBWay, etc...

This trigger fires when a new order is done.

This action will trigger the specified Bot to turn on the switch.

Create your own vending machine. SwitchBot will push the item.