Check the listing for details. Vintage IBM Computer Demagnetize Bar. Listed at 18.00 USD. The Vintage IBM Computer Demagnetize Bar is a rare and collectible piece from the early days of computing. This unique tool, branded by IBM, was used to demagnetize computer components to ensure proper functionality and stability. With its vintage appeal and association with a renowned brand like IBM, this demagnetize bar is a must-have for any vintage computing enthusiast looking to add a piece of computing history to their collection.