New kid on the block appears to be 2015ukkumo when it comes to blatantly passing off forged Nazi Military ID Passbooks on eBay, and as usual, eBay turns a blind eye to it. Put a real WW2 German war relic on there and it will get yanked so fast it's absurd.
Post a fake, and they will watch it get bid up and sold to a wannabe collector and laugh all the way to the bank. I've seen these pieces of garbage go for as much as a grand.
All of this trash is produced and sold on the web by a lowlife in Holland, knowing full well people are reselling them as genuine. His site does state the items are fakes, but the items are not marked as reproductions. He is also the supplier/seller of many of the fake documents you have seen on eBay.
I suspect he is actually the person posting them on eBay under various names. Don't ever buy from 1944shop.com, the guys a real piece of shit. (click to see his garbage)
If you have bought from these clowns, I suggest you complain to eBay and PayPal demanding a full refund, the link to the site proves the documents you paid hundreds for is worthless garbage. You should also file a report with the FBI CyberCrimes Unit(click)