What is the market value of my sites with a 3000 USD monthly income?

Hi,

I wrote the story about my movie-themed daily games a few months ago:
https://www.indiehackers.com/post/how-did-i-create-a-game-with-4-000-monthly-revenue-in-3-days-49b598a252

I got some offers for the sites but I am struggling with determining a realistic price. These are the websites:

• Actorle.com - generating 2.300 USD with Ezoic-based ads, it has 15,000 daily active users with a slightly declining trend.
• Moviedle.xyz - generating 450 USD with Publisher Collective-based ads, it has 2,500 daily active users with a steady trend.
• Actorle.tv - generating 200 USD with Publisher Collective-based ads, it has 1,200 daily active users with a slightly declining trend.

Knowing that the daily game hype faded a little, how would you value this portfolio?