There is more than just pricing at question here. If you go to your typical local gas station with a 5000 gallon tank and fill up the station will raise their prices above the other stations in the area because they will only have a small amount of gas in their tanks and so they want everyone to go elsewhere until the next delivery fills the tanks up again. (depending on when you fill up the station may not even have 5000 gallons in their tanks.) How much tank is left at any station is NOT public information shared with other stations in the area.

RealPage though has information on how many apartments are empty and uses that in algorithms even though it isn't public information.