I see quite a few ladies don't list prices on their profile. I presume they do this for various reasons better known to themselves. I never talk money over the phone when I ring a lady so I never ring a lady who doesn't list a price - I am probably missing out here by doing this I know but I just tend to skip on to the next when I see "Ask"!
I know there are a lot of guys who don't have an issue talking about money on the phone when talking to a lady - many will go so far as to haggle on the price which is totally disrespectful IMO.
I would imaging the ladies to don't list a price would get more hagglers than one who clearly lists a price - if her charges are at the higher end of the scale I'd also imagine she would get a lot more time wasters ringing up looking for a cheap appointment.
Do you ring or move on when you see "Ask"?