FWIW - Some photos to show things I look for:

#8478 - Two Krag bayonets, the top one has more grip damage, but, the blade edge is correct and the scabbard retains its finish and 'hanger' rivet is tight.

#8479 - This scabbard no longer has its finish and the loose rivet allows too much 'hanger' rotation.

#8481 - 1899 marked bayonet has nice grips and surface rust could be removed, but, blade has been sharpened.

#8482 - Damage done by sharpening the 1899 blade.

#8485 - 1899 and 1902 compared.

'bote' it is always best to buy in person and know if you like it.

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