Sometimes it may take you making triangulation deals. Take something you want trade it to the person who wants it, and has the item that someone else wants. Then take the new item to the person who wants it and has what you want. A simpler way to do this of course is by joining a barter exchange or community trade membership
With public domain content, you can revise, publish, modify, compile and create new collections or compilations and sell, use and giveaway this material however you see fit.
Only barter if both of you need each others services immediately. Having something usable down the road is great, but you come into the risk of the other party not fulfilling their part of the agreement.
Forget chickens for goats, and other archaic methods of bartering. Barter is alive and strong, especially in today’s economy, and will be here for many years to come. There are a great many benefits to bartering as a whole, and numerous reasons why you should be using it, whether you own a business or not!