I picked it up on Saturday. The final price, including tax, was $271.00. There are some pretty beat-up #4 Mk. I's around in the $200 + range, so this one was a bargain. I haven't had the time to research it on the web yet. The rear sight has an adjustable aperture, and it has a safety lever that is shorter than the standard one to clear the windage screw that takes the place of the standard rear sight pivot screw.
I shot it with Greek surplus ammo and was happy with the grouping, although I did not have an appropriate target for 100 yards.
Last year I picked up a #4 that had been sporterized with an aftermarket sporter stock, a Weaver scope base, and cutting the barrel back behind the front sight. When I picked it up and saw the $79.95 price tag on it, I snapped it right up. The same dealer had another rifle with a 5-round Santa Fe magazine, and we just swapped magazines.