There are two ways you can get the deal without finding a friend to buy together:
1. You can join an existing Duo Deal invite (from other users) in the list within the deal’s details view. The Duo Deal price is then immediately available to you. Please review the guide here.
2. If the above is not available, you can always choose the option to buy alone. However, please note that you will have to pay a higher price with this option.