[H] Officially Released 'burned' DVD movies?

[Steve Tomporowski]

As part of my eBay business, I acquire a lot of DVDs.  I've noticed that 
some older movies will have an official insert, the label side looks 
right, but the DVD looks like a recordable.  I don't want to sell 
anything illegal, but these movies confuse me. It always seems to be 
movies that could be in the public domain, but the label and insert look 
professional.  Is it possible that this is legal or just a very 
professional pirate?

Thanks...Steve