How to adequately calculate the cost of a site for sale?

Question

Monetization

Is there any exact formula that will help give an adequate estimate?

Answer 1

net income per month * 6 months (or 12 or whatever)

Answer 2

6-24 (very rare)
now when no one guesses Google

Answer 3

we take the net profit for the year, add the cost of the site itself (i.e. development, SEO, etc.). something like this on average. though it can be sold for more.

Answer 4

How much do you value the site itself, i.e. its creation, optimization, promotion, etc. This is the first part of the sum.
The second is the profit from the site for at least half a year.
In the third part, I included "potential", the possible scaling of the project or perhaps for its future growth, only investment in marketing is not enough. But this item is not suitable for everyone, often these opportunities are not available.