According to a press release that just came across my computer screen a little while ago, a limited number of $20 tickets go on the market tomorrow for Beyonce's upcoming Seattle concert at the Key Arena on April 1. It's unspecified how many tickets they'll have available in that price range, but tickets are listed at $99.75, $79.75 and $59.75 normally for the show.
So if folks are planning on going, or are even considering being dragged to the concert by their kids (which is often the case), then taking advantage of tomorrow's sale seems like a smart idea. You can go to livenation.com to purchase the tickets or charge by phone (800) 745-3000. Good luck!