Firstly, I don't want to sell this property right now because I am living comfortably and satisfied with it. I love my house, I like the neighborhood, and I have no plans to move anywhere.
Second, I doubt the buyer knows anything that I don't. Maybe there's a valuable natural resource lying under my land, or maybe a company plans to build a facility nearby and needs my land. If I were to sell this property, I would probably be Hatred after learning the real reason behind the buyer's offer.
Third, I don't want to be forced to sell my property. If I agreed to sell for $2 million, I would feel like I was being ripped off. I would not feel comfortable knowing that I could have sold my property for a much higher price.
Of course, I may still consider selling this property in the future, but only if I have enough information and am sure that it is the right decision. If I still do not want to sell after learning more about the offer, I will decline.