I have NEVER had one of these girls try to "upsell" me or ask me for more than what is advertised/specified.
Competition is fierce here in Toronto, remember prostitution is NOT illegal in Canada and these ads are legit.
Prices are higher in the US because of the illegality of the offer of sex for $$$.
Mudcat I can tell you that for $60 you can contact her and she will have sex with you, no strings attached.
I have visited a few of the advertisers of flesh on Craigslist, the setup is usually one of two:
1) The girls are working in an underground brothel operating out of a condo or apartment - there are at least two women available, usually more.
2) A girl is working alone, she takes her camera, phone and laptop to a hotel/motel and posts an ad on craigslist and services clients out of the room.
I know in America they are constantly saying you have to be careful that these aren't police sting operations but in Canada this doesn't happen.
In Canada, the cops are mainly concerned with pimps and underage girls.
PS: Many of the Asian/Eastern European girls are foreigners.