Markings are unlikely Japanesedue to western letters. Possibly post war South Korean rack number as a lot of these were used by them and reworked under US supervision.
As for value, low end for bayonets. Hard sell due to the damage to the hilt. The stampings don't hurt it so much but the rot does. The hook is also bent too far in and the muzzle ring is out of round. Both these can be fixed with a little care and the right tools. Kokura is the most common manufacturer also so that also limits it. I'd say between $50-$60 without a scabbard.