About 99.9% of Ayu DVDs on eBay are bootlegs, sad to say. Usually if it's priced under $20 then it's a bootleg. And yes, if it is region free then it's totally a bootleg. Usually the seller will make a big deal out of the DVD is it is authentic, I was bidding on a Complete Clip Box where the seller was saying in huge bold letters THIS IS REGION 2 FROM JAPAN. On eBay you have to ALWAYS make sure it's Region 2 (for Japan) or Region 3 (from Taiwan, but I can't play Region 3 anyway, so...).
Usually people buy the bootlegs because it a heck of a lot cheaper and, since most of the eBay market goes to the US, people here don't have region 2 players, so having it be all regions is handy. But I would never go that low
