For sale here I have a JG/Cybergun fully licensed SIG 552. It has full trades and markings and actually looks quite sharp. The build quality is pretty nice as well.
I got this in a lot of other items. It was having trouble with semi auto but I took it apart, could find nothing wrong with it and when I put it back together the problem seems to have gone away.
I also put in a heavier spring while I had it open so now it shoots 379.5 according to my F-1 Chrony. The gun looked like it had been shot only a few times as the body is perfect (no scratches anywhere) and the gearbox parts are pristine. The gearbox grease not even dark yet from use.
The gun comes with an 8.4v 1,100 Mah battery.
The gun does not come with a magazine but 100 round mids can be bought in pairs from airsoftgi.com for $22.00.
All in all, this is a much nicer gun than I expected, I just don't need it. It's also at an amazing price since it typically goes for $175 new.
http://www.shortyusa.com/airsoft.html?http://www.shortyusa.com/cart/viewitem.html?II=1564&UID=1267579654-70.121.51.172&CA=&RID=