I feel your pain. I really do. If you have no plans of ever using it again, don’t bother to repair it.
However, let’s look at the bigger picture... when you are gone it probably will get thrown out unless it is a working tool.
I personally have the M3 Trench Knife that my father was issued in WW2. I will never use it but, it is one of my most cherished possessions of my fathers belongings. Having a knife that my grandfather used would also mean a lot to me.
You know, now that I have had time to think about your dilemma, I have to say repair it. Set it up to be passed down in your family. It may not mean anything to your offspring but, to their children it could be priceless. I love a knife with a story to tell. Always more interesting than just a plain knife. I use the knives I received from forum members more often than the ones I purchased for that very reason.
So, you have a picture of your knife?
Pic is back in post #61. Highly doubt I'll use it. Chances of anyone in the family wanting it is close to zero, most have no interest in knives or firearms or even family history. I fully expect most of my "stuff" will go to an estate auction for disposal.
And to keep on thread topic... as a crew chief we weren't issued knives, many of us had a belt knife like a Buck 110.
I wasn't issued a knife until retraining to aircrew and it was the orange hook-knife that was supposed to be used for cutting parachute lines if needed. The ones we had were pretty crappy, and mine opened in the knife pocket multiple times, and then the blade release broke. And on those, instead of the hook blade being the spring-release, it was the main blade. The hook should have been the spring-release to allow for one-handed opening and line cutting. It didn't take long for me to decide to just carry a SAK.
Our survival vests had the old-style survival knife. Most that I am aware of carried a knife of some sort in the flight suit knife pocket, some of us carried multi-tools either as primary or a secondary, and some also carried a fixed-blade of some flavor. Some of us took the advice to have a personal survival kit with us whenever we flew, and had a decent fixed-blade in that.
Lost or stolen knives. A few. Multiple 110s. A nice survival knife walked away one day (not the cheap easy-to-break mall store, it cost a few bucks and I can't remember the brand). A couple of Gerber fixed-blades. Not counting the knives that seemed to come up missing during/ after a PCS.
Found knives. None. I never found anything, let alone anything nice. We had a loadmaster find a Randall in the cargo compartment after a paratroop drop. Where it was found it could have been there a while and finally worked its way out. He tried to do the right thing and contacted the group that had been dropped, but no one was missing a knife.