How much do you think worth the biggest subreddits ?

Hey let's imaginge that I was owning one of the biggest subreddits.
What will be the worth of the subreddits ?
Hiw to find buyers ?

Depends on many factors. The niche, NSFW or SFW, can it be monetized, also how active it is (size alone doesn't tell you a lot). Someone will buy a subreddit only if there's a way they can monetize it, otherwise it's not worth much.