I'm 99% certain it's a scam.

There have been a few scam ads posted by someone (or multiple someones) using her name.  At one point I heard someone took the bait, sent the deposit, and never heard anything again - no date, no refund, account closed, etc.  

In this case I'm kind of suspicious because it looks like the deposit is the same as the rate for one hour.  And, that figure is far less than the rate that Amy has been known to charge.

If you really want to see Amy, i'd suggest going through Pam Peaks.  (link below).  Pam has been listing Amy as one of her talent for a while now and probably knows the score.  She can set you up with Amy and then maybe Amy will give you direct contact info and/or a better rate once she knows you.

This seems to come up once every couple of months.  I think if you do a search of this board, you will see others similar to yourself asking the same question and getting the same answer, its a scam.  I've included a link to a prior inquiry from last December.