It's probably just leftover inventory unearthed from some years ago. QVC used to do various videogame special offers back in the mid/late 90s. I remember one hour they spend around pimping copies of Batman Forever and the kids they had playing kept getting their asses handed to them.
Anyway... don't shrug off QVC as far as finding games... they had original Dynasty Warrior 2 cars for $20 and I can't find those damned things anywhere. Long after Castlevania Chronicles was gone, they had a bunch in stock. And I got Metal Slug X from them for $30, two years after release when NO ONE could find a new copy.