You may be surprised re the price.. It depends on the target market, but based on the somewhat limited coverage (up to 1300Mhz), the DIN sized enclosure and the use of a BNC connector instead of N-Type, it certainly does not appear to be targeted toward Government/Military buyers.
So, moving right along ..
The AR8600Mk11 covers up to 3Ghz and costs ~$1k.
The ARD300, which I'm sure this receivers DV capability is based on, costs ~$800.
It really depends what inside the box. The specs say that it uses a direct conversion receiver from 100Khz - 18Mhz and heterodyne from 18Mhz to 1300Mhz, with a first IF of 1.705Ghz (most likely via a 1-2Mhz wide SAW filter). So, it appears that it uses a heterodyne/SDR architecture, which may also keep costs down by eliminating the need for expensive crystal filters.
Assuming (speculating) that the reduced coverage capability of the AR-DV1 offsets the units price a little and assuming this thing is actually aimed at the domestic/hobby market, I'm putting my money on a RRP of <$1500.
After all, who would pay more than $1500 for the AR-DV1, when you can buy an AR8600Mk11 + ARD300 for $1800?
Granted, the AR8600/ARD300 combination may not cover the same DV modes as the AR-DV1 at the moment, but I'm sure it would just be a case of a firmware update for the ARD300 to allow it to cover the same DV modes down the track.
I'd better start saving