I might get crap for this but I wish the serial number was required in the description. I see all these new SP5's popping up on GB and the ad says just in or fresh or whatever but they still have the old case. I think most of these are just regurgitated from other purchases, no sales, or shady antics such as shill bidding. And for the ads that say they are rare, have they not looked up to see actually how many are for sale on GB? Just by searching for 81000477 there are 49 right now, and possibly more with a different search. Yes, Rare. I also get a kick out of the ads that say NIB, never opened. Do they not check the serial number on the gun with what's on their invoice for consistency or is that just not done anymore due to bar codes and all?