1. Asking for your Pay Pal the first email.
2. Asking if you ship overseas.
3. Telling you he is buying for someone in your country.

This is a very simple Nigeria scam and they will send you some sort of “evidence” that they paid like a false screen shoot from Pay Pal or Western Union. They might also say that Pay Pal does not work so they want to send you the money with wire but they want more information they normal.
Here is a sample email they might send you

** CRAIGSLIST ADVISORY — AVOID SCAMS BY DEALING LOCALLY
** Avoid: wiring money, cross-border deals, work-at-home
** Beware: cashier checks, money orders, escrow, shipping
** More Info: http://www.craigslist.org/about/scams.html

I would like to know if you can help to ship the item to me and the
method of your payment. That is if the item is still availed. Do you
speak English?

Do not even answer the this email all you will get is more Nigerian scam letters and he know that your email is real now.