I would say the only time I would truly consider it is in this case (as a former president would say, feel my pain!):
I sold my Gamecube last November, after discovering that my Wii could play all the GCN games plus use the controllers and memory card. However, I stupidly put my memory card in the package I sent (I sold it on eBay). I obviously didn't mean to sell the memory card.
I had Fire Emblem: Path of Radiance saves in particular that had close to 40 hours in the game. I was getting to the last third or so of the story at this point.
I contacted the lady I sold the GCN to, and she was really nice and agreed to send back the card.
HOWEVER. When I got the letter (yes, she friggin' sent it in a paper thin business letter, ugh), the memory card was stolen. Someone had obviously cut open the side and taken the card out.
So..... I think I might use cheat codes to rapidly play through the game until I get back to the point that I left off at, so I can see the story's conclusion before the Wii Fire Emblem comes out this year.
-Rob