Salesforce Pricing depends on the Product and Features we choose.
1. First choose the right cloud.
a. Sales Cloud
b. Service Cloud
c. Marketing Cloud
d. Experience Cloud
e. Commerce Cloud(B2B/B2C)
2. Learn about Editions for Sales and Service Clouds as they provide different features. Based on the Edition we choose, the price varies.
Note:
a. Price and Usage Limits(Storage, API Calls, etc) are based on number of licenses(Users). So, always have a buffer.
b. There are Add-Ons available for additional cost.