Putting a price on something is a common phrase that refers to the process of determining the value of an item, service or experience. There are several other phrases that can be used as synonyms for putting a price on, including appraising, evaluating, assessing, and pricing out. Additionally, you could use the phrase "quantifying the worth of," or "determining the cost of." All of these phrases can be used to convey the idea of assigning a value to something, whether it is tangible or intangible. By using a variety of phrasing options, you can add variety to your writing and express your ideas in new and interesting ways.