The Sony a7RII has been out for over a year now but it is still an incredibly competitive camera with it's solid dynamic range, high ISO, and solid video performance. Fstoppers spotted a deal on brand new cameras for only $2,200. Take note that this is an import camera deal. This means it's possible you may run into issues that you wouldn't have purchasing through a standard distributor. That said, Fstoppers has purchased many of it's cameras through gray market purchases without issue. In addition, this eBay seller seems to have a very high rating which makes us more comfortable recommending the purchase. Check out the deal HERE.
If you're uncomfortable purchasing a gray market camera, you may want to try a more standard camera seller. The price might be a little higher, but the purchase comes with the certainty of reliable service and a warranty.
If you're unfamiliar with the Sony a7RII, Fstoppers wrote up a full review focusing on the cameras features. We also compared it to some of it's competitors, the Canon 5DsR and the Nikon D810, in this video.