Can you ask in a smaller scope, for example "the price of a house in your city"? There is no property price (eg comparing 2 houses with the same design) that can be determined due to several factors such as:
Area class - If the house is located in an elite area, it is usually very expensive because it is targeted by upper economy class individuals even though there is really nothing special (like well-known artists, where every product can be bought at high prices by fanatical collectors).
Accessibility - Location can become a pricing standard. You will see the price difference between houses on the roadside will be more expensive than houses in the middle of the forest because in a simple assumption the house is close to the center of the crowd, for example the market, hospital, police station, fuel station, presidential house, or whatever.
Security - This is the most important factor. There are several cities in certain countries that are hotbeds of gangsters or prone to criminal acts, so property prices there are not too expensive even with luxurious designs. Or also, the house is located in an area prone to natural disasters.
Sales process - If you buy directly to the homeowner, you will get an exclusive price. Another thing with you asking the price to the property agent intermediary. In fact they can charge up to 100% more than the homeowner's price (even more).
Not wanting to get off topic, there was 1 member who once offered a house on my local board. Fyi, This is not located in my city (maybe in my city you can get much cheaper)
Price as of January 14, 2018 : 9.8
BTC ($132.860)