Фильтр
Сначала дешевые
[{"ID":21691,"TREE":{"PROP_521":506}}]
[{"ID":21681,"TREE":{"PROP_521":515}}]
[{"ID":20870,"TREE":{"PROP_521":527}}]
[{"ID":20014,"TREE":{"PROP_521":581}},{"ID":20012,"TREE":{"PROP_521":506}}]
[{"ID":19892,"TREE":{"PROP_521":581}}]
