Salesforce does not provide a direct setting to assign a default Price Book to users. Instead, a default Price Book is determined by user access.
If a user has access to only one Price Book, that Price Book is automatically selected when adding products to Opportunities.
To effectively set a default Price Book, restrict access so users can only use one Price Book.
Use this step to restrict general access to Price Books.
Use this step to grant access to the desired Price Book.
Note: Price Book sharing must be configured in Salesforce Classic.
Important Considerations
000385388

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.