SELECT publication_date FROM table_name_90 WHERE reported_price = "$500,000" AND publisher_s_ = "people" AND person_s_ = "sean preston federline"
Berapa tanggal publikasi foto Sean Preston Federline yang harganya $ 500.000 dan diterbitkan oleh People?
CREATE TABLE table_name_90 (publication_date VARCHAR, person_s_ VARCHAR, reported_price VARCHAR, publisher_s_ VARCHAR)