Long story short, it had long been urban legend that Atari buried thousands of copies of ET for the Atari 2600 after the game flopped. It's considered by many to be possibly the worst console game...ever.
Having had it myself, I can verify it was indeed awful. Worst ever? Not sure about that.
I wonder if they'll find any of the Swordquest games too?
So I think I see the writing on the wall for James and Cubs, so I thought I'd see if I could do some automated thing. Looks like I totally miss all the DLC if I go just by Amazon - also, Amazon lumps some really weird stuff into this category.