The price of a prostitute worldwide is going down, according to this The Economist article, and they start out insinuating that the internet has made more competition, but when it comes down to it they report that economic hardship is more likely the reason. When you get down further, however, you'll see the range of price for given characteristics: if you're an athletic, blonde, long-haired, D-cup hooker, you can demand most any price you like. If anything, this sort of information is likely to further negatively affect the price of prostitution as more pros adopt long, blonde hair and start hitting the gym more often, since the product moves toward demand, which forces prices down, so it all comes down to the fact that, sex as a commodity, isn't so different from orange juice or blue jeans.

Via.