I run https://serverthiefbait.com/ and the highest plan is $900 (not recurring). However, nearly everyone who buys that plan seems to mail me with special requests, which I usually do for free but probably should switch to a 'contact sales' model and decide the price based on the customers needs.
It's usually things like "can you help us with automation to roll this out to every one of our users home directories", or "we want every wallet tagged with the computer name and path so we can respond quicker if theft is detected". Legit requests, but not features built into the built-in-a-weekend service.