I think this is simply the best deal in the knife world today. One can get "seconds" for $49.88 (my 11 year old and I each have one) and he wears his everywhere. We have studied our "seconds"--literally--with a magnifying glass and can not find anything wrong with them. The leather sheath is worth the price alone.
I have one and one of the similar Boat Knives, the Model 3. I have both the normal pouch sheath and the flap sheath issued to Canadian Forces. And I have the larger No. 4 Survival model, issued, I think, to RCAF aircrews.
I first saw the No. 4 in the April, 1965 issue of, Playboy, in what I believe was Robert C. Ruark's final article on safari. It was shown with Russell's boots like he favored, various firearms, other gear, and that Grohmann knife. I don't know if Ruark personally carried that knife or if the Playboy photo staff selected it on advice of someone else. It did look good in that big color photo of safari gear.
I wrote an article on the Grohmann firm and think they have an excellent operation, with good knives, priced at retail about twice the figure you cited.
I am very fond of some Randall designs and their Model 5 with five or six inch blade is a fine choice. With nickel silver guard , black Micarta handle and compass in the butt, it was the choice of famed outdoor writer Bradford Angier. That knife is also drilled for a wrist thong, with a silver lined thong hole.
However, I think that today, I'd choose Fallkniven's Model S-1, which has a five-inch blade very like that on the Randall Model 5. The non-slip handle is Thermorun or Kraton, I think the former. I have both Kydex (no longer offered) and leather sheaths. A Zytel sheath replaced the former Kydex option. The S-1 is called the Forest Knife and was designed to be an all-round outdoors knife. It would also be an effective weapon, if need be. Military users or survivalists may prefer the larger version, the A-1. It has a blade about six inches. It's expressed in mm, but six inches is right at the correct figure.
The A-1 and the S-1 are both terrific knives. Pick the size you think best. I have both, but might select the S-1 if pressed and only able to have one.
www.fallkniven.com . Don't panic at the prices; they're in Swedish kroner. Fallkniven does have US dealers. Work the buttons and see the line, inc. some very fancy folders with handles of abalone shell, etc.
If those are too expensive, look at the Buck Model 105 Pathfinder or Model 119 Special. My first really good knife was a Model 105, and I still have one and use it.
If forced to have just one folder, it'd be a Victorinox Spartan. If you'd rather have a Phillips-head screwdriver in lieu of the corkscrew, it becomes the Tinker. And I almost chose the former military model. I think that's now the Pioneer. It has silver Alox scales.