wanted to buy my dell e4300 listed on Toronto Kijiji and give me extra money to ship it to West Africa, offered me 350$ for the unit, which is/was twice what i was/am asking, plus shipping, an obvious scam

wanted to buy my lenovo ideapad yoga 13 i have listed on craigslist in las vegas. The person is willing to pay me extra $150 for shipping. After i said I am not interested and only preferred local transaction. He was still insistent to purchase the item. i ignore the request.