There is no reason to feel any guilt. The "trilogy" it seems has been authorized to sell on DVDs in some countries, by Lucas. But not in North American. As it is a "legit" title in the UK it seems. As it's in the UK database of DVDprofiler, as it is also for China and Eastern Asia, and Germany as well. And I'm sure if it was not legal to be sold in those places, Lucas would have had done something about it. It's not like it's being sold undercover on the internet. It's out in the open for all to see. And ebay would side with him, by banning the sales as well, if it could not be sold at all.
He is only screwing himself, the more he holds it back here.