As a forum owner, I got couple offers from interested marketers, and I know for sure 2 of them were legit buyers and highly interested.
I wanted to share with you a little bit of information maybe it will be helpful to other forum owners who wanna sell or even buy a successful forum.
So first you work hard on your forum, launch, population, investments after investments in content and promotion and finally after couple years you get to the point where the forum is doing well, there's revenue coming from left and right and you doing ok. At this point, you will see marketers coming to you with offers to buy it from you.
They will first ask your forum stats, last 12 months especially... for revenue and traffic of course.
You forward the stats, real stuff, no bullshit so that in case they wanna verify you can do so via TeamViewer or give admin access etc.
After that, they will ask the price, in case you didn't know the price for a general website is at least 12x monthly profit. But since you have a forum it can go up to 30x monthly profit and even more if you confident your project is here to stay 10 years + in the niche as an authority site.
So now you have a clue about your site value, you may ask for offers, personally, I have been offered so far 2 times $10,000 and one time $20,000 to sell BMF right now and I passed both offers.
In case you satisfied with the offer the best way to sell without getting scammed is by using Escrow service. Money is held and a fee is paid. That's how you do business online.
If you guys have any questions let me know and I'll do my best to answer it.