i think it is up to the escort to charge what she wants...
over here in dublin the standard rate seems to be €250. now that isn't cheap. in other countries you can get something great for one third of that price. but this is ireland. expensive and overpriced for almost everything. but also the average wage is higher than in most countries.
then again if you visit an escort, and she provides excellent service qand you leave with a smile on your face and a satisfied crotch area, i think the price is the last thing you'll be thinking about.
but if the escort was unpleasant and didn't meet your demands, you'll be unhappy to have paid 100, 250 or 500 euros regardless of the fee.
at a higher price you might attract less customers, but it will still be lucrative for the escort. imagine you get 300 an hour. and even if you just have 5 or 6 coustomers in 1 week, it's still a healthy return.

now generally you don't see too many escorts charging over 300 euro. compare that with london. you can get an escort from £120. standard rate is £150, which is a bit less than here. but there are lots of escorts who charge more like £350, £500 or so per hour. if i could afford such a fee, i would also pay for it. but i can't. the most i ever paid was £250 for one hour with that escort in london that was on tv. steep price, and i have received better. but still she was fantastic and i walked out pretty satisfied. 9 out of 10 i say.

i say they should charge whatever they want. if even 250 is too much for you, then maybe you should save up some cash and go on a 2 week trip to thailand or acapulco and fornicate all you want at basement prices. (was in thailand at age 14, so i didn't experience it, but it was still all around)

happy punting,
hp