From Booking Automation Wiki
Set whether properties that do not have a price for the specified booking condition are shown at the bottom of the property list or not shown.
- Sell Priority will display the properties in the order selected in SETTINGS -> BOOKING PAGE -> PROPERTIES -> MULTIPLE PROPERTIES -> PROPERTY SETTINGS.
- Unavailable at bottom" will display properties which are not available at the bottom.
- Hide Unavailable will not display properties which are not available.
- Hide Unavailable or no match will not display properties which are not available or do not fulfil the search criteria the guest selected.