It appears Ebay is being sued over its allowing counterfeit products to be sold on the site. So I guess if you're after a dodgy box set for a fraction of the normal price, it could soon be too late...

The article includes:

"Among the many complaints, the lawsuit alleges eBay developed and maintains a pervasive practice of obstructing and ignoring counterfeit enforcement through sham customer support programs. eBay purports to police such counterfeiting through its policy which states "You can't list replicas, fakes, counterfeits, or other illegal copies on eBay." However, test purchases have proven this is simply lip service offered to address a known, extensive and ongoing problem. Reality is starkly different,"

Full article here

BTW, as much as it seems appropriate to illustrate a discussion about fakes with fake Latin, it's actually "caveat emptor" (let the buyer beware!).