Does anyone want to SWAP a West Wing Series 1 DVD Box Set...

[Hassled]

..for Series 6 or 7?
I was given 2 copies of Series 1 for Christmas and have tried doing a swap at the local HMV but without a receipt they're not having any of it. It's still cling-wrapped etc, but I'm not looking to necessarily swap for a brand-new set of Series 6 or 7, IYSWIM.
Please CAT me if you can oblige - thanks.