Buying 4GB DDR2 RAM

Hi Guys,

I have shortlisted two Dual channel kit for my motherboard.

1) Corsair XMS2 DHX — 2GB x 2 Dual Channel DDR2 Memory Kit ( used one )

2 years usage - @ Rs 3755


2) 4GB G.Skill DDR2 PC2-6400 PK Series (4-4-4-12) Dual Channel kit ( new one )

from MemoryC.com - Computer Memory, Solid State Disks, Flash Memory Cards and Drives, Hard Drives, Worldwide Shipping

@ Rs 4582


Guys, i cant spend money on new hardware which can cost me above 15k, so i m upgrading my DDR2 RAM, so which one do you think is better ?

Is used Corsair overpriced ? or better to buy a new GSkill ram ?

Thanks in advance..