You can easily sell your events on your website using the Ticket & Invoice add-on. this add-on allows you to manage your attendees’ check-in, send out tickets and invoices in email format. Using this add-on, you can design your own invoice & tickets. The QR codes on the tickets enable you to check-in attendees using the QR code scanner device. Using this tool, you manage your payments on your own website. No need to refer your customers to any other third party websites.

Demo: https://webnus.net/modern-events-calendar/addons/