Answer: at any price
Explanation: In simple words, it refers to those stocks that are issued without any face value or par value. The advantage of issuing such stock that the prices are not predetermined by the company, but actually they are ascertained by the investors who are willing to deal with them in the market at issuance.
Therefore, these kinds of stocks are generally issued by the organisation who have competitive advantage over others or are industry leaders as they know that their stock will be priced higher.