Oliver wants to buy a textbook, Commercial Law, from a book website, Best-Buy-Books Ltd, which is based in UK. On 1 June, He searches by the book name and the webpage shows that the Commercial Law is 'in stock' and the price stated is HK$498. Oliver clicks the 'Buy' bottom provided right next to the information of the book and follows all the steps by providing his email address, postal address and bank details for payment, then clicks the 'Submit' bottom. Within a moment, Oliver gets an email sent from Best-Buy-Books containing the following message:

Thank you for shopping with us! Your order number is BBB-8888. Your order will be dispatched from our warehouse soon, and we will let you know once it's one its way to you.

After making the order, Oliver continues browsing the Best-Buy-Books web, and he discovers that there is the secondhand Commercial Law for sale, with only 20% of the original price. Oliver immediately writes an email to the customer service, which he finds on the web, informing them that he would cancel his order which was made 10 minutes ago and would order the secondhand version. There is no response within 1 June. On 4 June, Oliver gets the second email from Best-Buy-Books, notifying him that the book (order number: BBB-8888) is winging its way to him and will arrive in 7 days. Oliver refuses to take the book, insisting that he has cancelled the order and the valid order should be the one for the secondhand version. Best-Buy-Books refuses to refund.

Advise Oliver as to whether there exists a contract for the sale of the Commercial Law for HK$498.