One way to buy Lenovo is to google for Lot of X on ebay.com where X is about 3 years old. The off-lease deals and lots of great machines you can find is amazing.
Indeed, I got a top spec x220 for about 450. It was about a year old and still under extended warranty, and practically brand new when I got it. Buying a new Lenovo is worse than buying a new car in terms of depreciation.