Questions Regarding Selling a Used Custom Build

[Kevin38924]

As I am in the progress of upgrading from my budget build to an eyefinity build, I was looking to get some possible money to speed up the upgrading process. I was wondering how much you guys think I could get from these used components and where would be the best place to sell them, I have never really done any selling online either, so if anyone has any helpful links to selling components online or anything of the like, it'd be much appreciated

Here are the components that I don't need anymore, from my old build:
PSU: Cooler Master eXtreme Power Plus 500 Watt
CPU: i3-2100 Sandy Bridge
Mobo: Intel H67 1155 socket M-ATX
GPU: XFX HD6770
Case: HAF 912
Heatsink: CoolerMaster Hyper 212+

(I might sell my new monitor: VE248H, if I decide to go with a different one for eyefinity, as well as possibly sell my older monitor: S202HL, the second one I am likely going to sell though)