A different case here I'm afraid when it comes to condition, Its all very well paying a high premium for a something that requires restoration, but when the time comes to sell no one wants it, or the price is a fraction of a good example.
Most stuff like the one here are striped for spares or used to make a complete knife. I've spoke to the owner and await further pictures, to confirm if its legit and if the blade can be saved.
I've been asked to bring a few bayonets (hooked quillion ) to a few shows for interested parties in the past, but they stick there nose up as they are not mint examples........ I know what can be repaired and what cant be regarding knives , bayonets etc........ even blades like the one here can be brought back to a reasonable condition without too much removal of steel etc, but in some cases its just not possible and at the end of the day the blade is a quite an important part of a knife or bayonet.......... nothing worse than seeing something that is a very good example until its removed from the scabbard and the blade resembles a welding rod.