It appears to be a HJ-dagger with replaced grips...can't help with value, sorry...
sorry I dont know knife on left ...
The blade on the far left is a German Trench Dagger/Fighting Knife without Scabbard...
Left: Luftwaffe boot knife no scabbard> 80 euro max
Middle: 1st Luftwaffe dagger no scabbard> 200 euro max
Right: RZM hj knife with replaced grips, nice scabbard> 120 euro max
Regards Mac 66.