Depends on what she offers
If she offers a legitimate IN-CALL, she's saving me money on a suite AND she's the host. That counts for something in my book.
The going rate in my area is $350/hr for your basic escort. What you get for this rate is an average body, maybe some high mileage man-mades and most assuredly someone with an {staff edit-CK}.
I go $400 if she's relatively young/youthful and in above average shape. If she participates and is not just a couch cushion during the session, I'd be willing to go $500.
I have no problem with $600 - 700 if she's late 20s - mid 30s, immaculate body and not-a-fuck-up personality. Being with a competent, self-assured in her femininity woman makes all the fucking difference.
If they ask for deposits, if they can't keep up communication, if they are unsure about their own schedule, I delete. Experience tells me its a dead end