A guy wants to buy my item on craigslist, is this a scam?

Thanks for your response, I will like to buy this for my son schooling
in Nigeria as Birthday Gift,Please I will like you to withdraw the
advert on net cause i am buying from you now...i will be paying you
$140 for shipping through GLOBAL EXPRESS MAIL (EMS) and i will be
making the payment through my PayPal account get me your name and
PayPal account,looking forward to hearing from you soon.
Thanks

This is the email that the guy sent to me