I receive a lot of those emails, mostly from Nigeria.
A couple of yrs ago, I decided to play a dumb a** and play along, so I responded and provided my phone number. A guy called me the day after, so I talked S...l..o...w..l..y and asked so many questions, wasting about 1 hr. he was very excited about this potential catch

. I agreed to sending him a bank draft. He called several times after that asking about the status of the draft...again wasting hours and hours of his long distance time from Nigeria.
When nothing arrived in his mail (duh!), he grew impatient an dkept calling me on a daily basis, thats when I decided to tell him to go f*** himself after paying his huge phone bill.
Last I heard from him were angry ambigious words in Nigerian before hanging up the phone.