The same property can get a diffrent sale price witin a realively short period of time from different buyres. How many times do we see the deal fell through, the property goes back on the market and it gets a different price 2 weeks later ? Market condions have not changed and nothing about the subject has changed.
Since prices do not match exactly up for properties, making an adjusted range that matches exactly up does not align with the way the market operates. If the market operated perfectly, we could have a kind of Kelly Blue Book that they use for autos and use it for properties.
And even with autos with a blue book value, prices still vary among buyers - did they get it from a dealer, from a private seller, did financing terms make a difference etc.