Credit: Kevin Winter/Getty Images Photo: Nathan Fillion Looks Great in the Press Room at the Golden Globe Awards on Jan. 13, 2013

That’s right: Nathan Fillion, mystery writer extraordinaire, is set to autograph Cryptozoic’s 2013 Castle Season 1 and Season 2 trading cards!

These cool keepsakes (which can cost up to $600!) include episodic images, character bios, behind-the-scenes info, and autographs from other cast members. Nathan’s no stranger to these fan faves — he’s done it before for his previous shows Firefly and Buffy the Vampire Slayer.

This year, fans are in for a treat as Cryptozoic is also releasing an oversized costume card featuring eight of the show’s main cast.

These cards are limited to only 25 copies, so be sure to get your copy when the cards become available March 5, 2013.

And if you’re not into trading, they can always be fridge decorations. Just sayin’. Would you buy Castle trading cards? Tell us below!