Is Lenovo X1 Carbon used 3 years worth 425$ ?

Hello everyone.

Is Lenovo ThinkPad X1 Carbon Ultrabook worth 425$ (400€ or 340£)? It was used 3 years.

Specs:
CPU - Intel Core i7 3667U (2.00GHz)
Memory - 8GB RAM
Storage - 250GB SSD
Graphics Card - Intel HD Graphics 4000
Screen - 14"; 1600 x 900 resolution
Operating System - Windows 7 Professional
Battery - lasts 2-3 hours.