My Lenovo G555 from 2011 failed after 3 years. Its video chip died from heat--a common problem. New motherboard and insides cooled from external fan box. Was $350 on sale at Fry's Electronics, down from $500
My Dell Latitude CPxH-500GT from 1999 is built like a tank--never fails. Refurbished sale from Dell Business for $700, originally $1800
My Dell Inspiron R15 from 2012-13 is about the same, but I use only on a desk with external keyboard, monitor and mouse. On sale at Office Depot for $500, $100 off.
My HP Elitebook 2740p laptop/tablet from 2011 seems fine, $100 on Ebay last June, down from $1600.