All the time. Whenever I spend a large amount of money on anything non-essential I have to think for ages about whether or not it's worth the purchase. It's not even that I can't afford the stuff, it's just that I keep thinking about all the other stuff I could be buying with the money and whether or not that'd be more satisfying. With the £200 I spend on a new games console, I could buy seven or eight games for one I already have, for instance. God knows how long it'll take me to finally decide on something big like a car. xD