Matt Bissonnette, the Navy SEAL who wrote a controversial book about the raid to kill Osama bin Laden, recently sold his pocketknife.

The price: $35,400.

Bissonnette, who wrote "No Easy Day" under the pseudonym Mark Owen, offered up the knife, which he carried during the iconic mission, as part of a fundraiser to benefit the families of fallen service members.

The knife was posted May 1 on an online auction site and sold Wednesday after receiving 18 bids. "I wanted to help in anyway that I could," Bissonnette wrote on the listing, under the name Owen.

The money generated from the sale of Bissonnette's trusty Emerson folding blade will go to the family of Chief Petty Officer Brett Shadle, a Virginia Beach-based SEAL killed during a March parachuting accident in Arizona.

Shadle and Bissonnette served together with Naval Special Warfare Development Group, also known as SEAL Team 6.

The knife should be in great shape: Bissonnette told ABC News it was his backup blade.