Teleka
Teleka are telephone cards. Think of them as paper quarters in Japan - stick this in the phone and it will let you make a call. On average they are about $10 per card but rare ones go for much more.
Due to their small nature, I don't collect these as actively as other items. Telekas tend to have big logos or text on them so I try to stay away from those particular ones.
That red X on the Kamui with the kitten teleka I have is so distracting and what a strange spot for it to be (lol cat's butt).
All my teleka are unused with the exception of Subaru.
Alichino
(The) Betrayer Knows my Name
K-Books
Nitro+
Shonen Onmyoji
Suika
Toraware no Minoue
Trinity Blood
Vampire Knight
X
The Red Kamui 10th Anniversary teleka came in a nice metal boxWanted Teleka