How much can i sell my website | Proxies-free

Hi every one.
I have an educational website. (Yel . network). Last month 12k visitors 19k sessions (most of the visitor came from email, I have 15k subscriber on my mailing list with more than 30% click rate) and making more than 500$ through adsense and 200$ through affiliation. I want to sell it urgently but buyers keep asking me for the minimum price. How much can i sell it?