I noticed you found some caches in my neck of the woods in NJ., so you may have see one of these:
If so, that is one of my signature items - GeoCash. There is no monetary value. Grab it and keep it if you like. The link on the back is no longer active as I changed internet providers a while back. If you want further info on GeoCash, check them out at this LINK.
That's exactly what I've found. Wasn't sure what it was. As the link is no longer active what would I do with it now? Keep it and just trade it with other items at caches? Or keep it? Still a bit lost. What did they use to be before you changed isp's?