question: How to buy a dedicated IP address
answer: 
  If you are new to ExpressVPN,
  
  On your browser, go to expressvpn.com/order to pick a VPN plan.
  During checkout, you will see an option to add a dedicated IP to your order.
  Once you’ve successfully purchased your VPN plan and dedicated IP add-on, set up your dedicated IP by following these instructions for Android, iOS, and Windows.
  
  If you already have an ExpressVPN subscription,
  
  Go to your subscriptions page.
  Under “Subscription details”, you’ll see a dedicated IP add-on. Select “Add to Plan”.
  Complete your order. Then, you can set up your dedicated IP on the ExpressVPN apps for Android, iOS, and Windows.