Options are sold on real estate all the time. If I see a house for sale and think for whatever reason I can find a buyer willing to pay a lot more or that something will occur to end the value up, I can offer the seller a deal where he would write an option. Say the house is listed for $100K, and the seller doesn't have to move immediately. I offer $5K for the right to buy it for $100K up to one year later. The seller keeps the $5K whether or not I buy it. As I suspected, a company announces the purchase of an office building nearby, and new workers will need housing, sending values up. I am able to sell the house for $125K the day I buy it for $100K.
You can sell options on property you own. That was why I commented. Not sure how could could ever arrange to sell an option if you don't already have the property or an existing option to buy it.