no not a good deal. which C2D r u talking about, beside u can get better mobo of G31 chipset from gigabyte and all.
C2D E7400 is the one @2.8G Hz
G31 mobo price around 2.2-2.5K + C2D E7400 in 5.7K, what OEM are you talking about can you give us more detail of it.