How Much Should I Sell My Gaming Computer For?

[NightFeather]

So I decided to stop playing video games and I am selling my gaming computer. That way I can still play games at school with my friends on my laptop but I can't play hardcore games at home so I have to be more social instead.

I am selling my gaming computer and want some advice on how much to sell it for.
I will probably just sell it locally at my school. Some advice on where to sell it instead would also be helpful (I'm 14)
I have had this computer for about a year now and clean it every few months. I will dust it extensively before selling it, but will not change the heatsink.
So here are the specs and all the components:

Tower:
-EVGA GTX 660 FTW Sig 2
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130833
-i5 3570K
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504
-Rosewill Wireless Lan PCI Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16833166051
-ASRock Z77 Extreme 6 Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157295
-Corsair TX650 PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139020
-8 gb of DDR3 Dual Channel Ram
-Some 500gb Hard drive
-Normal case with 3 case fans (1 intake 2 outtake)
-Stock heatsink

Peripherals:
-Random $10 Keyboard that works enough that I game with it but is falling apart that I probably will include for free
-Logitech G400S (Barely Used Condition)
http://gaming.logitech.com/en-us/product/g400s-optical-gaming-mouse
-Razer Goliathus Mouse Mat (Moderatly used Condition)
http://www.amazon.com/Razer-Goliathus-Omega-Mouse-Mat/dp/B002R0DX1E

Monitor: An Asus 1080p 60Hz monitor that I bought for around $150
It is still in good condition and would just need to be cleaned

Audio:
I have these really nice headphones that I mainly bought for gaming because they have amazing surround sound. I will probably sell these and get a more mobile version for other uses.
-ATH A700X (Less then 6 months old barely used condition)
http://www.amazon.com/Audio-Technica-ATH-A700X-Headphones/dp/B000E9VKUQ


So could you more experienced guys recommend a good price for each section? Like for the tower, peripherals, ect.?

Also something to note is that I spent about $1200 for the tower and monitor when I bought the parts.

Thanks so much for taking your time to do this! :3

 

[tiny voices]

In reality, you will probably get about 30% less than each part is new combined for it.

For example a used gtx660 can be had for $140. You need to see what all the parts are going for used.

Don;t forget that you will get more money parting it out rather than selling it whole.

 

[4745454b]

I'd say $600 maybe. $700 once you include the monitor. Prices are what I see on used forums, rounded for easy math. 660 $150, 3570k $150, wifi card $20, Mobo $80, 650W PSU $50, 8Gb ram $50, 500GB drive + no name case $50. So $550? If you try to sell whole some of this stuff won't matter to people like the wifi card or a 500GB drive. Stock sinks usually go for shipping. A normal 1080 monitor is around another hundred so anywhere from $550 for just the tower, to $650 counting the monitor, to $700+ counting both and a legal copy of windows. Mouse is probably close to what it would be new, minus 20-50% depending on condition. Computers depreciate fast, they aren't investments.