Hello nicksofar, let me first welcome you to the forum.
Unfortunately I have to tell you that for a collector of original items of the III.R., this dagger does not have any value. It is a well known phantasy piece which never was produced during 33-45.
There also do exist some variants of this phantasy dagger also beeing pure phantasy.
Sorry that I cannot tell you better news, perhaps it is collectible at it´s own but I dare to doubt that.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.