Often I find that the only items worth taking are the signature items that people leave in caches or geocache related souvenirs. For example, I recently picked up a pin that says "Heck yes, I am a Gila Valley Geocacher". It is a small simple pin with a picture of the Gila Valley on it. There are lots of cheap items like this that people usually look over, but are still worth taking. I value this kinds of items more because they are reminders of my geocaching experiences.