Thousands of counterfeit Gibson electric guitars were seized in a multi-agency investigation at the Los Angeles-Long Beach Seaport.

The 3,000 fake guitars, if real, would be valued at about $18 million, according to authorities.

U.S. Customs and Border Protection officials, U.S. Homeland Security Investigations, the Los Angeles County Sheriff’s Department and Gibson Inc. announced the seizure at a late morning news conference.

“These guitars… may look real to you, but trust and believe…