We do not recommend that you do so! The problem when buying a second-hand, fire-rated, cabinet is that you do not usually know how it has been handled previously. Because the actual protection in a fire-rated cabinet is not visible, since the insulation material is concealed, it is in reality impossible to promise that it is not damaged and, thereby, the protection is no more. Our general recommendation is not to buy a second-hand fire-rated cabinet, if you are not completely certain that the cabinet has been handled correctly. On the other hand, a burglary-resistance rated cabinet is not as sensitive and it is easier to see if anything has been damaged, so our general recommendation is that you can buy second-hand cabinets.
