Marlon wanted to buy a second hand car. He went on the internet to search for a suitable car to purchase from all the online advertisements. He saw a picture of a BMW sports car being advertised as "For Sale" that he wanted to buy, so he contacted the advertised seller, negotiated a good price and paid the bargain purchase price of P100,000 thru PayPal (a system to pay online purchases via the internet).After one week, the car still wasn't delivered to his house as agreed upon with the unknown seller. So, Marlon takes his policeman friend and they go to the house that is in the picture of the BMW car. When they get there, Marlon is aghast or shocked to learn that the car wasn't being sold on the internet, and that the owner of the house and the car was not the same person Marlon was negotiating with and paid on the internet.

What type of contract is the contract of sale Marlon entered into with the internet seller of the BMW? Why do you say that it is that type of contract? Explain your answer.