I have found that trading on Etsy is one of my favorite activities. I feel like it’s taking a step back in time to a place when you used to barter your goods for the wares of others. I always have a ton of stuff to make jewelry and I don’t always have a ton of money to spend, so it only makes sense that paying in jewelry can be a good thing.
If you are interested in trading, there is a list of Etsy shops that are open to trades here: http://etsytraders.blogspot.com/ but I’m not sure how often it is updated. Some shops list that they are trade friendly and you can find many threads in the Etsy forums about it.