Our SaaS Pricing reports try and find sites that have a Plans and Pricing page that mention specific monthly or yearly pricing.
In this example the average is $595 so we put this site (our own) into the SaaS Pricing over $400 group
For example if we find a Plans page that lists 3 pricing points, we will sum those and provide an average and put the website into that group i.e. "SaaS Pricing Over $100/Month".
The site has to list pricing plans in a supported currency symbol ($, Euro and Pound) and explicitly mention the plan duration (monthly or yearly) for us to add this information to records.