The antonyms for "most beat up" include "brand new," "mint condition," "pristine," "flawless," "perfect," "immaculate," "untouched," and "like new." These words describe objects that are in a pristine state or have never been used or damaged. These antonyms are commonly used in the context of buying or selling belongings such as cars, furniture, or electronics. People often seek out these types of items, as they indicate quality and value. While "most beat up" may carry negative connotations, the antonyms present a positive picture of well-maintained objects that are in perfect condition.