I cant afford to fill up two tanks of gas, but i still gotta go to work. The economy is absolutely fucked no matter what economists say about avoiding a recession.
I've developed a bit of a variation on this: Don't buy it unless you're willing to put that number again into savings/investment. A little more strict, but also forces a careful analysis of short term-wants vs. long-term goals. Caveat: obviously some major expenses don't qualify, but are necessary regardless.