A few years ago Louis CK started selling tickets for his shows exclusively from his website. His post announcing the process is worth a read. I bought tickets for that show from him and the process was as simple as he describes it.
https://louisck.net/tour-dates : 'Regarding ticket resale: we take great efforts and have many methods of finding out what inventory is being sold on "broker" sites like Stubhub and Vivid Seats and immediately invalidating those tickets.'