How much is a world war 1 bayonet worth?

To an interested buyer these can go anywhere between £2300-£5000, But Why would you sell such a beauty?

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Anywhere from nothing to hundreds of dollars. It's difficult to price a bayonet without knowing more about it. Condition, country, maker, whether it was used in WW1 etc all play a role in what the price would be.

If you want an idea what your bayonet is worth, check out Ebay's militaria/ww1 section and compare yours to what is listed. This gives you a good idea about what the market will pay for your bayonet.