How much should I sell this laptop for?

[henrywang97]

It's a 3 year old custom gaming laptop from cyberpowersystem.co.uk, I bought it for £770.

CPU: Intel i7-4710MQ Mobile Processor 2.50 GHz, 6M Cache, Max Turbo Freq. 3.50 GHz
HDD: 1TB 5400RPM SATA300
MEMORY: 8GB (8GBx1) DDR3/1600Mhz SODIMM Memory
VIDEO: NVIDIA GTX 950M 2GB
SCREEN: 16:9 aspect ratio, 17.3 inches

 

[RememberThe5th]

Well , 2014 tech, probably half of original price if in very good condition, im just on pure guess, also set price as negoiable.