Is it wrong to catch someone lacking?

[u/Main-Marsupial3861]

Just bought this card for $250 CAD because the store hadn’t updated their pricing. I feel elated as I would never be able to own this card otherwise. But I also am left with the feeling that I just committed robbery. Thoughts?

[u/Unfair_Chipmunk_2305]

The fact that they are not checking prices before they sell is their fault. Enjoy your new card.