One thing about DSi's is this, pre-book wholesale price was upwards of $190, and it slowly declined by $5 every week or so. Even though we're selling them at retail price, gamestop and other retailers probably only make $5 per unit. If you really take a look at the pot odds, it's not much, investing $165 to make $5.
But it's okay, we have hope in bad-pot-odd-hardware-items and hope that like any other electronics store, you'll come in and purchase something else while you're at it.