Event Tickets Plus allows you to add as many tickets as you wish to a given event and sell those tickets entirely within your WordPress site. Each ticket has its own price, stock, SKU, and specified timeframe for when ticket sales open and close.

Demo
https://theeventscalendar.com/product/wordpress-event-tickets-plus/

Download
https://www.filecad.com/impO/Event-Tickets-Plus-v4.10.8.rar