I deal with fraudelnt customers all the time at work, here's some tips for you.
1) They don't care what it costs, and are willing to offer you a better deal if they think you will go along with it.
2) anything they write is written out lenghtilly with poor grammar. (yes I know thats not a word)
3) They like using "their" ups or fedex number to pick it up.
those are the only ones I saw that applied to you email. but...
4) Relay calls are almost always bogus. I hate relay calls... and fraud monkeys.