What is my laptop worth (for sale private party)?

Core i7 2670QM 2.2GHz
1GB NVIDIA GeForce GT 550M
8GB DDR3 RAM
750GB 5400RPM Hard Drive
14" 1366x768 LED
Webcam
Bluetooth
BD-DVDRW
802.11n
Windows 8 pro
Perfect physically
Battery condition iffy
Added (1). Sorry, I forgot to say it is a Lenovo y470

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