I love your cards so much that I have been inspired (required by my current campaign) to create my own with my own artwork, the GIMP, and a color laser printer:
-- Thin black gloves (gloves of dexterity): existing gloves in the cards are bulky and good for punching monsters, but not so good for rogues and assassins.
-- Stone box with runes denoting abundance (field provisions box, basically a cornucopia picnic cooler): existing boxes in your card sets are rare enough and did not really denote foody kinds of things.
-- Mundane artworks which can be redeemed for money.
-- An obsidian ring with magical properties.
-- A mundane comb.
-- A mundane set of silverware.
-- A mundane goblet.
I hope these inspire you; your cards certainly inspired me. Rest assured that I am not using/abusing your artwork or text, although my cards have a similar layout.
One other note: I mostly use these so that I can provide a player with stats on an item (say, a magic sword, or a sroll with a spell) without the player (or me, the GM) tediously flipping through the book for details during game play; and also to help players to trade/sell the items more easily and conveniently. I don't use the cards for keeping track of how many food rations or mundane arrows someone might have on a day-by-day basis.
Thanks again for your awesome cards!