I'm sure everyone here might know this, maybe I'm preaching to the choir, but watch out for PVC coin flips. I checked my twin's collection which was sitting in his basement for about 20 years, and the results are in the YT short linked below if anyone wants to see. https://youtube.com/shorts/Oh8305k5uSo?si=qpcTtS4LScUxwxt5 Green ooze stuff... fun fun fun!
Most anything you buy now is advertised as being non-pvc. I thought the industry had mostly gotten away from this years ago.
Good point! Maybe it only affects the collections sitting in basements for 20+ years. I imagine there's probably some less reputable suppliers on Amazon or Temu that might not pass the test, but unsure.
So those coins were luckily all worth face value, I sent them back to the bank except one SBA wide rim that I gently wiped. It will not regain its luster. It's a details coins at this point, but luckily not ultra rare. This was my brother's collection that he got when we were kids, he isn't a collector so he wasn't hurt by it any.