I bought one from Marstar (Before Armco had any) Definately recommend the Armco route.
Mine came from Marstar completely stained with what appeared to be blood. The whole gun itself, as well as the styrofoam box it was in was covered in dried blood...it was quite disgusting. After cleaning the thing off, I took it out and was happy with it. Nothing special by any means, and I bought it more or less as a 'tester' from Marstar before I bought anything worth more from them. I've had no issues with mine, but I only shot it once and put it away.... Good plinker I guess, but the sights are pretty basic