doesnt seem like a bad deal to me... i have that same year DH, but the DFC edition. i dont believe the technology has changed since and that was the first year that they had the slimewalls. the boards edges also seem to be in good shape
as for the sellers discription, personally it seems pretty legit to me. he has a 100% positive rating and including "Burton", "Cartel", and "P1" is very common. just my .02
oh, and i also am about 50% park 50% hill, and the DH is amazing all around.