The Jim Jefferies presale code has been listed: When the Jim Jefferies presale starts, everyone who has the password has an opportunity to buy sweet seats before anyone else. Jim Jefferies presale password You might never have another chance to see Jim Jefferies's show in National Harbor!
Jim Jefferies show info:

Jim Jefferies
The Theater at MGM National Harbor
National Harbor, MD
Fri, Nov 9, 2018 07:30 PM

Onsale to General Public
Start: Fri, 04/20/18 10:00 AM EDT

Live Nation Mobile App Presale
Start: Thu, 04/19/18 10:00 AM EDT
End: Thu, 04/19/18 10:00 PM EDT

Live Nation Presale
Start: Thu, 04/19/18 10:00 AM EDT
End: Thu, 04/19/18 10:00 PM EDT

You can use this presale passwords and information to buy tickets:

Our Passwords are for WiseGuys Members

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Here is a hint: When ordering show tickets on the web, don't forget that Best Available is not always the best choice... you may learn that "the best" is too expensive or not what you expected. I recommend selecting a price level or an area of the venue to limit your search.