I’ve used stub hub for a sporting event abroad that was sold out.
They are a subsidiary of one of the big guns that caters for those people that can’t go anymore….allegedly
I paid double the ticket price plus about £30 admin fee. This included delivery to my hotel and there were no problems at all. Stub hub kept contacting me before and on delivery day to see if everything went smoothly

Equivalent tickets were on sale on viagogo for about ten times face value so a lot more