At the time I was in spain, and had no money but I did have many liters of olive oil, so I made soap after finding a book on it in a deserted and trashed caravan and was trading it for other things from people! I then also found a book on how to make various wines and around me was alot of fruit trees :) It was easier to swap the wine (which turned out as some kind of cider) than the soap, the hippys around wernt much interested in using soap hahahahahah