When advertising a used vehicle, which of the following terms cannot be used without declaring that they are used?

When advertising a used vehicle, the term "special purchase" is misleading if used without a clear declaration that the vehicle is used. This term can imply that the vehicle is new or in like-new condition, which may mislead potential buyers into thinking they are getting a deal on a new vehicle. The Federal Trade Commission (FTC) and various state regulations require that advertisements be truthful and not misleading; therefore, if "special purchase" is used to describe a used vehicle, it's necessary to clearly state that the vehicle is pre-owned to avoid confusion.

In contrast, terms such as "limited time offer," "luxury vehicle," and "negotiable price" can be used without needing to clarify the condition of the vehicle because they do not inherently imply that the vehicle is new or create a false perception about its condition. These terms focus more on pricing strategies or market positioning rather than the vehicle's condition.