The Tegan and Sara pre-sale code has been published: During this special presale you have got a good chance to buy concert tickets before the general public. 
You might not get another chance to see Tegan and Sara’s show in Pittsburgh.
Here are the Tegan and Sara show details:
Tegan and Sara
STAGE AE
Pittsburgh, PA
Sat, Nov 5, 2016 07:00 PM
Onsale to General Public
Start: Fri, 04/29/16 09:00 AM EDT
End: Sat, 11/05/16 07:00 PM EDT
PromoWest Presale
Start: Thu, 04/28/16 10:00 AM EDT
End: Thu, 04/28/16 10:00 PM EDT
You can use this presale passwords and information to buy tickets:
Presale password for Tegan and Sara at STAGE AE in Pittsburgh Nov 05, 2016 - click for more info