Merchants Express Money Order Company, Inc Dr. Jones Express money order Wormleysburg, Pennsylvania

I listed a playstation 3 on craiglist for 240 dollars and the day after I got a response saying "Hi, I'm interested in your item. Please tell me if it is still available, your firm price and your email so i can replay by it" I assumed that they were near me so i gave my email, i replayed giving my email address and after I got this email.

"Thanks, i got your email. The price is okay for me, I  needs to purchase for my Son that traveled to West Africa for his international studies and i want to send him a birthday gift, because his birthday is coming up soon..
I would have come to pick it up myself but because of distance, if you do have a paypal account,i could use it to make the payment to you Or your Full name, or please send me your Full contact Address,City,State and Zip Code if you wish to receive the money through money order. I will be paying you the total of $340 for both the cost price and the shipping...
[Please i need the information fast so that your payment will reach you soon to be enable to receive the Packages fast.

I was so stupid and stressed and it was urgent that I send him all my mail information.

i was expecting a money order through the mail but right after I got an email saying that:

We write to notify you that your payment $340.00USD have been Confirmed and is now ready to be delivered to your address. We demand that you ship today and send the package tracking/shipping information as soon as possible to enable us deliver this payment to you. Send all shipment information to our customer care service at (merchant.moneyorder@ovi.com)

This is for verification purpose and for the better service of our customers.

The buyer of your item Dr. Jones requested that the package must be shipped to the following address.

Buyer request information

name: Obinna Jones   address: Post Office Quarters Agbani

city: Enugu    state: Enugu State   zip code: 400001   country: Nigeria     status: confirmed
 
Proceed to shipping as the funds is ready to be delivered to your address immediately.
You must mail the package out today and get back to us with the shipping/tracking information as soon as possible.
Ensure to present the code below to the deliveryman on receipt of payment. We deliver cash payment worldwide.

Delivery date for payment remains when we get the shipment verification from you.

Please proceed to the shipping immediately.
 
Note the turning number: (84555) must be presented to the deliveryman on the receipts of payment.
 
Thank you for using Merchants Express Postal Service Money Order Payments Express Payment SM. We look forward serving your Online Money Order Payments needs in future.

I typed in Mercant Express money order and I found this website about similar scam stories happening on Craigslist.

I immediatly sent  a text message to him saying that the deal is over and that I looked up his money order company and I found scam news all over the place.

Now i dont know what is gonna happens now, how can i be sure that nothing is gonna happen or any money request or stolen identity will begin. i really need you help for this.  looking for your answer.
thanks