Page 11 of the online PDF states:
At the cost of one Action, a Survivor can reorganize the
cards in his inventory in any way he wishes. The Survivor
can simultaneously exchange any number of cards with only
one other Survivor currently in the same Zone. This other
Survivor may reorganize his own inventory for free.
I read this as Survivor A (the active survivor) can reorganize his Inventory as an action, and, if he chooses, can also trade 0-5 items to any one other survivor, Survivor B, in the same zone as him as long as both Survivors have inventory room available to handle the cards being traded (so neither Survivor A nor B can end up with more cards than he is capable of carrying at the end of the trade). Survivor B can trade 0-5 items back to Survivor A in exchange for Survivor A's cards, and may rearrange his inventory for free as well.
I have played incorrectly up until now, forgetting that Survivor B can rearrange cards. This is a huge help, especially with the flashlight.
The only concern I may have is that Survivor A can basically take items from another survivor without trading any cards from his own inventory for it, which seems odd to me, but then it's the exact same effect as if Survivor A just gave Survivor B his cards without taking any in return. Either way, an action is lost for the trade, and only 2 survivors will ever get to trade per trade action, so it really doesn't matter. In the end, you lose a potential move or combat action from the trade, so it must even itself out somehow.
The wording may also be confusing because of "exchange," which to me involves a minimum number of 1 card per trading survivor, but that may just be semantics. It also says "any number of cards," so no cards is not omitted with rules as written. Rules as intended may imply each survivor needs at least 1 card to initiate a trade, but then you have the exception for a wounded survivor with no cards in his inventory that cannot "exchange" cards, but can still rearrange his wounded card, and simultaneously trade with another survivor as part of that rearrange action under the rules as written.....
Hmm. Tricky rules wording, in my opinion. But, the game is about killing as many zombies as possible. I now understand how some might consider passing around the chainsaw in melee a bit "unthematic." Luckily, if it's a multiplayer game, it requires 2 people to agree on the trade. Single player, I'd say on some scenarios you almost need that kind of help especially early in the game.
I'll have to try it out and see how it feels.
~iPaint