The phrase "is marked at" can be replaced with a number of synonyms, depending on the context. Some options include "is priced at," "is indicated at," "is denoted at," "is recorded at," and "is identified at." "Is marked at" commonly refers to the price of an item, but can also be used to indicate a location or significant point in time. Using synonyms can add variety to writing and prevent repetition. Keep in mind that each synonym may have slightly different connotations and potential nuances, so it is important to choose the right word for the specific context.