The custom Shield RMSc with GLASS seem to start at $560 (for black) and go up above $600 for the other colors.
The good news is it's only a 6 week wait time (plus shipping across the pond). IF they could cut $100 off of that, I'd be more interested.
Right now I'm waiting to see how the 6MOA holosun 407K does (since I preordered one for $220).