Selling Knives on K-BID: Legal Guidelines for Sellers and Affiliates – Affiliate Knowledge Base

Knives are commonly listed on K-BID for a variety of purposes—collectibles, tools, display pieces, and more. However, sellers need to understand that knives, especially larger or specialty models, are regulated at both the federal and state levels. This is particularly important when selling across state lines.

This article outlines key regulations you need to know and provides specific notes for Minnesota and surrounding states.

Federal Regulations

At the federal level, the primary concern is with switchblades and ballistic knives:

Switchblade Knife Act prohibits the interstate sale or shipment of knives that open automatically by a spring, button, or gravity. Unless the buyer is exempt (e.g., military or law enforcement), these knives should not be listed for interstate sale.
Fixed-blade, folding, or collectible knives that are not automatic are generally not restricted at the federal level.

State-Specific Guidance

Minnesota

Most knives are legal to own and sell in Minnesota, including large fixed-blade knives and collector’s items.
However, it is illegal to carry knives that are considered “dangerous weapons” in public without lawful purpose.
Automatic knives (switchblades) are prohibited to possess or sell under most circumstances.
Context matters: A 14” medieval knife may be legal if sold as a collectible or display item, but not if sold as a weapon.

North Dakota

It is illegal to possess switchblades, gravity knives, or spring-loaded knives, unless you are a licensed dealer or exempt by law.
North Dakota restricts carrying knives with blades over 5 inches unless you are using it for a lawful purpose (e.g., hunting, fishing).
There is no specific restriction on selling fixed-blade knives as long as intent is not malicious.

South Dakota

Knife laws in South Dakota are more permissive. There is no statewide restriction on blade length.
Switchblades are legal to possess and sell.
Concealed carry of knives may be restricted in certain municipalities.

Iowa

It is illegal to possess or sell switchblades, ballistic knives, or knives with “projecting blades”.
Iowa prohibits the carry of knives with blades over 5 inches without a valid reason.
Collectible or display knives (even large ones) are generally permitted, but switchblades are banned.

Wisconsin

Switchblades are now legal to possess and sell under state law, unless local ordinances say otherwise.
No statewide restriction on blade length.
Carrying concealed knives is allowed with a valid concealed carry license.
Local municipalities (especially Madison and Milwaukee) may have stricter knife ordinances.

Best Practices for K-BID Sellers

To ensure your auction is compliant and protects both you and the buyer, follow these recommendations:

Do not list or ship automatic or spring-loaded knives unless you are certain they are legal in both your and the buyer’s jurisdiction.
Include a compliance disclaimer such as:

“It is the buyer’s responsibility to ensure compliance with all applicable federal, state, and local laws regarding the purchase, possession, and transportation of this item.”
Clearly label the knife’s blade length and type in your listing.
If listing large or specialty knives (e.g., medieval blades, combat knives), emphasize that the item is for collectible, decorative, or display purposes only.
Do not ship knives internationally and be cautious with out-of-state shipping unless you have verified the laws of the destination.

Final Reminder

Knife laws can be complex, and enforcement varies by state and even municipality. What is legal in Minnesota may be illegal in another state, or vice versa. All sellers and affiliates are expected to research and follow the law.

If you are ever unsure about a specific knife or blade, please contact K-BID support or consult local legal resources before listing the item.