Secondhand Motherboard and CPU value

[aka.Goliath]

So I want to sell my mobo and CPU and want to see what it's value really is, it's a Intel i5 661 dual core hyperthreaded 3.33Ghz, and an Asus LGA1156 ATX P7P55D-E LX. Also where is the best place to sell it?

EDIT: I bought the CPU for R2000 and the MoBo for R1500