First I want to clarify something very important, no one is implying in any way that ebay itself is a "scam" site, promotes or intentionally allows scam artist to flourish on its auction site. As with any site open to the general public, especially internationally, scam artists will flourish, and ebay is no different.
Having said that, one of the most abused areas of the site is WW2 German memorabilia, and it is absurdly abused. You will see things for sale from Latvia, Poland, Lithuania, Russia, etc. that simply never existed in WW2. Tons of SS Goblets, rings, cigarette cases, watches, and anything else you can think of for sale on ebay 24 hours a day, seven days a week.