There are a few possible reasons for this:
Sometimes the location data that the screen owner has is not 100% accurate. Try looking around the map to see if the screen you are looking for is in a nearby area.
Sometimes the screens are clustered together into one location (indicated by number on the marker), particularly when there are lots of screens close together, like in shopping centres and train stations. Clicking on this marker allows you to view the screens in this location.
The owner of the screen has not yet made the screen available for buying via our application. We update our screen list frequently so please come back soon or send us a message directly if you’d like to know about a specific screen.