Here are my current Retro 51 pens plus one Acme. The first 13 all glow in the dark. Last three are the Apollo, Space Invaders and the Acme Rat Fink Pen. The Retro 51 display case just came in the mail today. As you can see it will hold 16 pens. 13th from the left is the 4 Ever Pen which came to me from my friends in England.
Here they are with the lights out.
This maybe what happens to Ink Pens that pass on. Add them all to your collection.