Even on sale, they (unfortunately) aren't cheap, but thankfully my brain is broken when it comes to thinking about the cost of clothing and accessories. Here's how it works:
Item: Two nightstands. Cost: $400.00 for both.
Me: Whoa. That sounds like a lot of money. Who charges that for furniture? Maybe they'll go on sale.
Item: Marni dress. Was $1120.00. Now $560.00.
Me: OMG!! 50% off? That's sooo reasonable for a designer dress!!
Sadly I also have a rational thinking part (i.e., my mother) that says, "You just bought a house, and you can't sit on a dress." Boo.