There are a plethora of synonyms for the phrase "very expensive". For instance, one could use exorbitant, pricey, steep, lavish, extravagant, high-priced, dear, premium, top-end, or costly. Each of these words conveys a sense of financial strain and significant expense. Depending on the context and tone of the message, some phrases may be more appropriate than others. For example, if one were describing a particularly luxurious item, "lavish" or "extravagant" may be more fitting. Alternatively, if one were expressing frustration with a high price tag, "exorbitant" or "pricey" may be more effective in conveying that frustration.