$50-100? That sounds like a price she's using just to get in your front door, something you don't want to do. Like the others have warned, chances are there'll be some major upselling going in. I answered one stripper outfit that advertised in a rag back in the Twin Cities. Girl came to my door -- beautiful young woman -- along with her driver.
Luckily, he just gave my place a quick once-over, then I gave her the agreed-upon fee and she turned it over to him. Not 30 seconds after he was out the door, she told me she needed more money -- $150 -- that what I had just paid was for the driver and the company. Stupid me, I agreed to that. I asked her to wait in the entryway of my apartment building (yeah, I wasn't going to leave her alone in my apartment), then hit the nearest c-store for the required amount.
After I got back and we started to get to business, she said if I wanted FS, it'd cost more -- another $600. Yeah -- No. I settled for what little I was getting and called it a night.
For a couple lessons on giving her your main phone number, I met a low-level provider on one of those phone-chat services. All she offered was oral, and I thought it was going to be a one-time thing. One night after work, I was just settling in for some TV when I got a phone call: "Do you want some oral tonight?" No "Hi," no "How's it going?" Just "Do you want some oral tonight?" I was just glad no one else picked up the phone.
Another time, a few days after one provider visited me at my place, I got a call from another provider. I had no idea who she was, although she introduced herself as a friend of that first provider. I turned her down, then called that first provider. She said that, yeah, she knew that other girl; she was visiting from out of state and she had gone through the first provider's stuff and that's how she got my phone number.
If this is really your first time -- and if you're really balking at $50-100 -- wait, okay? This just isn't the time.