"It's not that I'm not careful," Joe told me. "I just use it. This is what it looks like when you pull it in and out of a bag for a year."
Apple's Smart Covers start at $39 for a polyurethane version like Joe's, or $69 for one that comes in "rich, aniline-dyed Italian leather."
Of course, not every Apple Smart Cover looks like this after a year of use. Depending on how well you treat yours, it may look pristine. That said, at least the polyurethane ones don't seem terribly durable.