Ask HN: I received an offer. Should I sell?

If you buy into A/B testing, then you probably have the possibility of increasing your revenue significantly, which would drive up your price above the recommendations here. (Disclosure: I think I can guess the site you're talking about from recalling a reference you made elsewhere.) Also, there may very well be CPC referral opportunities associated with your domain which, in-season might yield far more revenue than what you're seeing, although I'm not sure how gray those networks are.