G&g mp5 sd6
I bought my G&G MP5 SD6 from buyairsoft last year for just over $300 and now it's like $378. The gun is pretty good, nice battery, metal body, good ROF. I had a spring bust in the mag before I even got to use it but I sent it back and they fixed it.
I think I got a pretty good deal on it but I wouldn't pay close to $400 for it now.