Knowledge that property has been acquired under circumstances amounting to theft may be presumed in the case of a person who acquires it for a consideration which the person knows is substantially below its reasonable value, or that a person possesses property whose affixed identification or serial number is altered, removed, defaced or falsified. In addition, knowledge that property has been acquired under circumstances amounting to theft shall be presumed in the case of a person or dealer who acquires it for a consideration, when such property consists of traffic signs, other traffic control devices or historical markers and the acquisition is not accompanied by a written authorization for the property's disposition from the Department of Transportation, Department of State or other entity which owns the property.