There's the classifieds on this site. Otherwise a certain retailer who's store has the name "dragnet" in it's name could probably custom order you one NIB if you don't want used. Although you'd need to be AV'ed to get the full name of this guy's store.
So AV is kind of the only option here.
Also try out a G36 first before buying. You may find that you like the K or C variants better.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE