You can expect prices similar to UK, main difference is that girls rarely publish prices online, all gets discussed over phone, if you have no level of french, then it gets difficult.
Upside, more ethnic variety if you are into this.
Good site to visit, with punter review:
[[Link hidden, login to view]]
Google translate if you need help with the lingo
Important point in legislation there, currently its the service provider that is charged if arrested, there is a debate of changing this to the punter being charged if arrested.