...then you'd need more money than sense to buy that, too. Now, if I thought anybody cared how much I'd spent on luggage, I'd buy the canvas cases and stick my cheap'n'cheerful cases inside so people thought they were expensive...
Plus, if carrying expensive stuff, the last thing I'd do is put it in an expensive-looking, branded, case. Might as well write "steal this one!" in large letters on it.
Oh, I'm sure you could do better than that - come on, pile on moooorrrreeee gold & diamonds...
I can come to terms with wealthy people buying super-expensive clothes and jewellery for occasions where they want/need to look glamorous because that's the function of such things - especially if they are genuinely handmade by craftspeople and, hence, unique. What seems stupid is people paying premium prices for what is still, basically, mass-produced, factory-made stuff with a famous badge stuck on. These sleeves certainly fall into that category (and I hope Apple don't let that business model contaminate their computers...)