This has to be tgtgt.  

http://boston.backpage.com/FemaleEscorts/start-your-summer-wt-and-wild-come-see-pornstar-gianna-michaels-satisfaction-guaranteed/35266568

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if you google the email address there are a bunch of links that it is a scam, small deposit should set off the red flags

Thanks for showing... Always a danger in deposits, and even legit providers are now sometimes having you sign non reversals with deposits.

I don't like this because your appt can be bumped to a non ideal time or canceled due to a variety of reasons and you will be out of luck.

Yes this appears to be a scam. Rate would be at least 1200 an hour but for her would likely be closer to 2k due to popularity.