I'm firmly in the ubiquity camp for this, but with a just-in-time delivery system rather than buying in one giant batch.
Every whiteboard should have a large stock of great pens. If I start to write with a balky pen, I throw it out instantly. (Please, HNers: if you ever see somebody put a bad pen back in the tray, smack them.) When we get down to a merely adequate number of markers in some room, I spend 60 seconds on Amazon and order a bunch more. Prime + One Click + purchase history search makes this a breeze.
Every whiteboard should have a large stock of great pens. If I start to write with a balky pen, I throw it out instantly. (Please, HNers: if you ever see somebody put a bad pen back in the tray, smack them.) When we get down to a merely adequate number of markers in some room, I spend 60 seconds on Amazon and order a bunch more. Prime + One Click + purchase history search makes this a breeze.