So, just my 2 cents worth... I took an approach to this "sport" that I am having fun with. I really play to find and move travel bugs, which is hard because most of the caches inventory is not up to date. But the most fun for me is making sure that each cache that I visit has enough swag in it to make it worth finding. I found beanie babies and hot wheels work best. I have started to attach a tag to each item that says to trade even, up or not at all, just a little tag I made on the printer and laminated. I know it wont always work, but maybe sometimes, So, I know I have not been doing this for very long, but if I find a cache, I leave it well stocked, I'd love if a few others did the same. I just cant stand finding a cache with nothing, even if I don't actually trade for anything. PS. Playing cards can be found a thrift stores, usually 3 or 4 for a dollar... Ain't that cheap...