While the intention of this thread is great, ultimately, it winds up being useless. I have three kids, and will be taking them all to Disney this summer. For two it will be their first time. The third lived in Florida for many years before moving to New York to be with us. While she lived there, she visited the parks many times, and had a pin collection, but unfortunately, it didn't come to New York with her.
She had such fond memories of pin trading that I decided I would get pins for all three kids to trade. We will be there for 7 days, and I wanted to at least be able to give them 2 pins each per day to trade. When I did the math, and realized that at $6+ each per pin, that was going to cost me more than $250, I started looking for a better deal.
I read this entire thread, from the first post to the last, and finally settled on an online seller who was recommended several times in this thread. I made my purchase with a fair amount of confidence since I had gotten the recommendation here, and hadn't seen anything bad posted about the seller.
I received my pins today, and started going through pin pics. The first package of pins all seemed to check out, no noticeable defects, no mistakes on the information in the back stamp.
Then I opened up the second package of pins, and was immediately concerned since they were all packaged in those little plastic zip lock bags. Sure enough, the first two had warnings that there were unauthorized versions sold directly from China, and there was no way to verify the authenticity of any pin. Then, pin #3 from that package is certainly a fake. It should be a "1 of 3" and is instead labeled "3 of 3."
My point being if you are actually going to trade pins, as opposed to just buying them and keeping the ones you buy, then you are going to get fakes, and unless you take every pin, and scrutinized it before allowing your kids to trade it, there is a pretty good chance that you are going to pass off fakes as well, whether you intend to or not, that is just the way it is. Ultimately, to the kids it doesn't matter, as long as they like the way the pin looks, they couldn't care less if it is legitimate or not. If Disney isn't stopping this from happening, there is no way that the casual trader, the parent of kids who want to trade, can be expected to know 100% whether every pin their kids trade is the real deal.