How much is my MacBook Pro worth?

I need to sell this computer ASAP but I don't know how much its worth. Here are the specs:

Specs and Features:
Model: Apple MacBookPro8,2
Condition: Used (one barely noticeable bump, and tiny scratch, nothing noticeable)
Mac OS X 10.7.3 Lion
Intel Core i7 Quad-Core Processor @ 2Ghz
8GB 1333Mhz DDR3 RAM
500GB HD @5400 rpm
15.4" (1440x900) Display
AMD Radeon HD 6490M 256MB / Intel HD Graphics 3000 512MB
Super Drive
Bluetooth
Wifi (802.11n)
SD card reader
FireWire 800
Apple Thunderbolt Port (Up to 10GB/s)!!
Audio Input/Output

Please help! Thanks!

Mac2Sell - Guide to used Mac, iPad, iPhone & iPod - Evaluation - Argus Mac, iPod, iPad, iPhone Occasion is a good website to price it.

As long as it's in good condition and everything works about $1500-$1700. I buy and resell on craigslist locally in Las Vegas, so I'm basing the price off of the market here. Hope this helps