How much would you sell this for?

Hi there. looking to sell my old laptop. It is a Sony Vaio S purchased mid 2011. Here are the Specs

-Windows 8 Pro

-Intel Core i5 @2.30 GHz

-5GB Ram

-500GB hard drive

-AMD Radeon HD 6470M

The rest of the tech specs i am unsure of but it includes a cd/dvd drive, hdmi port, 1 usb 3.0 and 2 usb 2.0, sd card slot etc.. And a brand new sheet battery which costs 200$. i know the person i am selling it to. also it is out of warranty

Cheers