Lenovo Ideapad G550 2958-9PU 15.6-Inch Laptop (Black) by Lenovo (1) Date first available at Amazon.com: June 20, 2010 Buy new: $499.99 $449.99 10 used & new from $449.99 (Ranking is updated hourly. Visit the Hot New Releases in Laptops list for authoritative information on this product’s current rank.)

Read more here: 
#4: Lenovo Ideapad G550 2958-9PU 15.6-Inch Laptop (Black)