Sony Walkman X Series 16 GB Video MP3 Player w/ OLED Display by Sony Date first available at Amazon.com: May 13, 2009 Buy new: $299.95 (Ranking is updated hourly. Visit the Hot New Releases in MP3 Players list for authoritative information on this product’s current rank.)

See original here: 
#5: Sony Walkman X Series 16 GB Video MP3 Player w/ OLED Display