The 2007, 8 shot, 3 1/2" Registered Magnum is a Lew Horton Exclusive offering that was produced by the Performance Center.
It was originally introduced in blue. 350 were produced. Later that year 250 were produced in nickel. Original MSRP is $1,699 in either finish. You do not mention if the one you are looking at is blue or nickel.
The firearms shipped in Performance Center aluminum cases with 2 or 3 full moon clips and the Registration Certificate. The Lew Horton Registered Magnums are all built on 4 screw frames.
As to performance, these are fantastic revolvers. I have found mine to be amongst the most accurate that I own. I love being able to load up 20-30 moon clips the night before going shooting and just pop them in and out of the revolvers.
Remember these revolvers come out of the PC. So to start off, that means that they have air gauged, match grade barrels. It means that the tolerances are tighter than on production guns because the PC replaces their tooling more often. It means that the hammers and triggers are forged instead of MIM (not a performance issue, but forged look prettier). It means that the actions are superior to the normal off the shelf production gun. Trigger stops are fitted. Plus other differences from production guns that I just cant think of at the moment.
On the down side, the top strap checkering could be better.
As to price, The few that I have seen hit the used market were in the $850-$1,000 area.