Upload & Sell: On
I bought a DSTE grip with an en-el18 d4 battery clone for my d800, for $90. I haven't had it very long, but so far, I'm happy with it. There are a couple of older threads on this grip, within the last 2 weeks IIRC, if you want to read up on it.
The DSTE grip, without the big battery, is about $60. I realize that the Nikon grip is probably better, but there's just no way I'm paying $400 for a grip that I don't really need, especially when the alternatives seem to work okay, at ¼ of the price or less. I like the feel of the camera without the grip, but that battery is just incredible.