On a previous thread, many DISer's posted sellers from whom they had personal dealings and received scrappers. Unfortunately, both of the sellers listed, bibbidy-bobbidy-boo has had very bad dealings with several members, all of whom got scrappers (this person was very rude in dealings when questioned about the authenticity of the pins they sold). Tradepinsforyou has also had people mention bad pins. I just looked at this person's individual pin auctions which look OK, but the lot pins are a HUGE red flag. I've never had personal dealings with this seller and cannot say absolutely I have received scrappers from them, but the auctions, the price and the sheer VOLUME of pins cheap would indicate they are fakes.
There are many threads on the damage that trading scrappers causes, I hope you can take time to search them out (on collectors board). If you think you have scrappers, please do not trade them or distribute them at the parks. On occasion, people have noted that CM's will not accept a trade when they are scrappers. If you have kids, and this were to happen, I cannot think of something more horrifying to a child who is just wanting to trade. With the volume of fake pins being distributed, the CM's and Disney are taking steps to curtail the release of these pins in the parks, shops, etc.
If you want to ensure you are trading authentic Disney pins, in the way pin trading was created to be, buy your pins @ the Parks, the
Disney Store, or other authorized retailers on Disney property. YES they are more expensive, but pin trading is NOT a cheap pasttime; it is very expensive. If you cannot afford to buy the pins to trade, there are other things you can do at the parks that are just as fun (penny pressing is great, etc.)
I am grateful that OP is taking the time to investigate the authenticity of the pins they bought, and am in no way trying to place blame or make judgements. But if you think you bought scrappers, put them in your book and enjoy them, please don't trade them. The pin trading community that does buy authentic Disney pins and trades them, are the ones who are affected most by infiltrating scrappers.
Now that you have some knowledge as to which pins are real and which ones aren't, it is up to you to decide how to deal with your own situation. I urge you to make the right decision, not just the right decision for your pocketbook.