As a builder myself I can appreciate your question but I can tell you now that your components will not be worth as much as you would like. I belong to another forum which has a Marketplace section and after a certain amount of posts this becomes open and i buy and sell components there rather than Ebay because there is no fees etc. Generally the rules are the minimum you will need to discount is a third. Then you need to include postage which is normally recorded delivery. To give you some idea I am currently selling my Silverstone FT02R-W for £140 + courier this case cost me £204 + delivery last August.

I will come back with some prices, it's a little early or rather late.LOL.

Mobo £45-50 providing you have all the boxed bits.

GPU £50-55

RAM £28

PSU £30-35

DVD £5

HDD £30-35

Cooler £35-40

CPU £80-90

Case £20-25

Win 7 £70-75

total £388-420inc of postage.

Hopefully if you are splitting your rig you kept all boxes,user manuals, cables etc. Obviously you may well do better than the above prices but unfortunately most items are old before you even by them. Of course you could probably sell it to mate for a little bit more but if you flog the parts on Ebay these days you will have to factor in the fees ,which are getting a bit steep particularly when you add PayPal's fees(also owned by Ebay.

as Dell boy would say lovely jublee i tell u what i give you tenner for the whole lot