Cheapest price ever for this (PS42-02) according to camel^3. Price is $150.85 with $20 off at checkout. Also, the bare tool is $111-$20 if you're in the market. (Also a low).
"non-Brushless" impact drivers are less (or about the same price currently with this deal) but this is newer and, well, brushless (and has better light control.)
Side note: Yes, there are other 12v impact drivers with higher torque ratings, but I've used a PS41 and a Makita DT03 extensively and their 900-1000 in/lbs of torque has been perfect for my needs. (YMMV obviously.)