The only time I've really wanted to kill someone for taking something of mine was when someone broke into my car and stole a hand painted set of Tarrochi cards that Jim Mawby (a good friend) had done for me when he was laid up in bed with a broken leg.

The cards were useless to anyone else unless they played a particular group in the LT at the time.

Literally irreplacable.

(pax_draconis - only the major arcana, but enough to tell the story of Luciano with.)