Bills helmets recently signed by O.J. Simpson being sold for $400-plus

Memorabilia from O.J. Simpson's first post-prison autograph session has hit the collectors market.

Steiner Sports is selling two replica Buffalo Bills helmets signed by the former running back - one for $399.99 and the other, which includes a "HOF '85" inscription, for $449.99.

TMZ Sports reported earlier this month that Simpson held a secret autograph session in a private Las Vegas hotel room just days after he was released from prison. A Steiner representative told TMZ that it didn't hold the signing, but rather purchased the autographed items from a third party.

"Collectors collect and O.J. Simpson is a part of sports history for his accomplishments on the field," Steiner CEO Brandon Steiner said. "He’s a Heisman Trophy winner, 10,000-plus yard rusher, and Hall of Famer. We are just trying to answer the demand of our customers looking to complete their collections."