Well, there are two worths-actual worth would be not too much as there are old, made out of just ok steel and with plastic handels, certainly not your high quality knife by some of todays standards...
So saying I rather like the shape and am a big fan of the sheath system, I always regret not getting one when they were once avaiable, I want to satisfy that whim, however it will not kill me NOT to get one, so price is hard to quantify, if one came along that had the sheath and was not broken then I would be interested in it, even if the knife iself was fairly rough- but I would not pay an arm and a leg for it.
Cheers