Retail-box PC games?
Sometimes, it's cheaper - especially on Amazon, these days and age. You know, since they likely are trying to get you to buy physical stuff + b/c they have Prime service and all. Oh, and since they probably want to clear some of their shelves at their warehouses so they can put new products on there.
Example: Mafia 3 PC retail-box is a bit cheaper (currently $17.39) than the digital-version right now ($29.99).
Yeah, I know - most of us w/ decent Internet connections (like myself) likely would just open the game-box when it arrives; take the game-code from Steam or Origin in the case + activate it up; download it directly anyways.
Now we only need seven boxed games to go on sale for $5 each instead of ten.
I could go for that, as long as the boxed $5 games are cheap and come w/ Steam-keys, Origin-keys, UPlay-keys, or tie to some digital-service.